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Finding the Fourth Proportional to 553,347.80, 830,021.70 and 453,620.60

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Solution

The fourth proportional to 553,347.80, 830,021.70 and 453,620.60 is: 680,430.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,347.80 : 830,021.70 = 453,620.60 : x
  2. Step 2: Convert to fraction form
    553,347.80/830,021.70 = 453,620.60/x
  3. Step 3: Cross multiply
    553,347.80x = 830,021.70 × 453,620.60
  4. Step 4: Simplify right side
    553,347.80x = 376,514,941,567.02
  5. Step 5: Solve for x
    x = 376,514,941,567.02/553,347.80
  6. Step 6: Final answer
    x = 680,430.90

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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.