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Finding the Fourth Proportional to 721,807.20, 1,082,710.80 and 497,858.40

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Solution

The fourth proportional to 721,807.20, 1,082,710.80 and 497,858.40 is: 746,787.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,807.20 : 1,082,710.80 = 497,858.40 : x
  2. Step 2: Convert to fraction form
    721,807.20/1,082,710.80 = 497,858.40/x
  3. Step 3: Cross multiply
    721,807.20x = 1,082,710.80 × 497,858.40
  4. Step 4: Simplify right side
    721,807.20x = 539,036,666,550.72
  5. Step 5: Solve for x
    x = 539,036,666,550.72/721,807.20
  6. Step 6: Final answer
    x = 746,787.60

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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.