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Finding the Fourth Proportional to 708,757.12, 978,047.76 and 402,792.58

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Solution

The fourth proportional to 708,757.12, 978,047.76 and 402,792.58 is: 555,832.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,757.12 : 978,047.76 = 402,792.58 : x
  2. Step 2: Convert to fraction form
    708,757.12/978,047.76 = 402,792.58/x
  3. Step 3: Cross multiply
    708,757.12x = 978,047.76 × 402,792.58
  4. Step 4: Simplify right side
    708,757.12x = 393,950,380,613.62
  5. Step 5: Solve for x
    x = 393,950,380,613.62/708,757.12
  6. Step 6: Final answer
    x = 555,832.70

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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.