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Finding the Fourth Proportional to 708,169.18, 977,242.90 and 402,244.61

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Solution

The fourth proportional to 708,169.18, 977,242.90 and 402,244.61 is: 555,080.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,169.18 : 977,242.90 = 402,244.61 : x
  2. Step 2: Convert to fraction form
    708,169.18/977,242.90 = 402,244.61/x
  3. Step 3: Cross multiply
    708,169.18x = 977,242.90 × 402,244.61
  4. Step 4: Simplify right side
    708,169.18x = 393,090,689,185.77
  5. Step 5: Solve for x
    x = 393,090,689,185.77/708,169.18
  6. Step 6: Final answer
    x = 555,080.20

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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.