Home / 830,000.80-1,245,001.20-469,801.90

Finding the Fourth Proportional to 830,000.80, 1,245,001.20 and 469,801.90

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Solution

The fourth proportional to 830,000.80, 1,245,001.20 and 469,801.90 is: 704,702.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,000.80 : 1,245,001.20 = 469,801.90 : x
  2. Step 2: Convert to fraction form
    830,000.80/1,245,001.20 = 469,801.90/x
  3. Step 3: Cross multiply
    830,000.80x = 1,245,001.20 × 469,801.90
  4. Step 4: Simplify right side
    830,000.80x = 584,903,929,262.28
  5. Step 5: Solve for x
    x = 584,903,929,262.28/830,000.80
  6. Step 6: Final answer
    x = 704,702.85

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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.