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Finding the Fourth Proportional to 557,689.65, 769,549.25 and 315,920.44

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Solution

The fourth proportional to 557,689.65, 769,549.25 and 315,920.44 is: 435,934.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,689.65 : 769,549.25 = 315,920.44 : x
  2. Step 2: Convert to fraction form
    557,689.65/769,549.25 = 315,920.44/x
  3. Step 3: Cross multiply
    557,689.65x = 769,549.25 × 315,920.44
  4. Step 4: Simplify right side
    557,689.65x = 243,116,337,661.67
  5. Step 5: Solve for x
    x = 243,116,337,661.67/557,689.65
  6. Step 6: Final answer
    x = 435,934.82

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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.