Home / 721,901.57-1,084,815.20-385,180.12

Finding the Fourth Proportional to 721,901.57, 1,084,815.20 and 385,180.12

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Solution

The fourth proportional to 721,901.57, 1,084,815.20 and 385,180.12 is: 578,817.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,901.57 : 1,084,815.20 = 385,180.12 : x
  2. Step 2: Convert to fraction form
    721,901.57/1,084,815.20 = 385,180.12/x
  3. Step 3: Cross multiply
    721,901.57x = 1,084,815.20 × 385,180.12
  4. Step 4: Simplify right side
    721,901.57x = 417,849,244,275.89
  5. Step 5: Solve for x
    x = 417,849,244,275.89/721,901.57
  6. Step 6: Final answer
    x = 578,817.47

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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.