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Finding the Fourth Proportional to 720,555.91, 994,349.91 and 393,854.35

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Solution

The fourth proportional to 720,555.91, 994,349.91 and 393,854.35 is: 543,509.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,555.91 : 994,349.91 = 393,854.35 : x
  2. Step 2: Convert to fraction form
    720,555.91/994,349.91 = 393,854.35/x
  3. Step 3: Cross multiply
    720,555.91x = 994,349.91 × 393,854.35
  4. Step 4: Simplify right side
    720,555.91x = 391,629,037,475.61
  5. Step 5: Solve for x
    x = 391,629,037,475.61/720,555.91
  6. Step 6: Final answer
    x = 543,509.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.