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Finding the Fourth Proportional to 518,475.80, 777,617.70 and 144,421.40

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Solution

The fourth proportional to 518,475.80, 777,617.70 and 144,421.40 is: 216,605.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,475.80 : 777,617.70 = 144,421.40 : x
  2. Step 2: Convert to fraction form
    518,475.80/777,617.70 = 144,421.40/x
  3. Step 3: Cross multiply
    518,475.80x = 777,617.70 × 144,421.40
  4. Step 4: Simplify right side
    518,475.80x = 112,304,636,898.78
  5. Step 5: Solve for x
    x = 112,304,636,898.78/518,475.80
  6. Step 6: Final answer
    x = 216,605.36

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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.