Home / 830,043.80-1,245,065.70-515,115.80

Finding the Fourth Proportional to 830,043.80, 1,245,065.70 and 515,115.80

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Solution

The fourth proportional to 830,043.80, 1,245,065.70 and 515,115.80 is: 772,673.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,043.80 : 1,245,065.70 = 515,115.80 : x
  2. Step 2: Convert to fraction form
    830,043.80/1,245,065.70 = 515,115.80/x
  3. Step 3: Cross multiply
    830,043.80x = 1,245,065.70 × 515,115.80
  4. Step 4: Simplify right side
    830,043.80x = 641,353,014,108.06
  5. Step 5: Solve for x
    x = 641,353,014,108.06/830,043.80
  6. Step 6: Final answer
    x = 772,673.70

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.