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Finding the Fourth Proportional to 576,008.10, 864,012.15 and 520,020.90

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Solution

The fourth proportional to 576,008.10, 864,012.15 and 520,020.90 is: 780,031.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,008.10 : 864,012.15 = 520,020.90 : x
  2. Step 2: Convert to fraction form
    576,008.10/864,012.15 = 520,020.90/x
  3. Step 3: Cross multiply
    576,008.10x = 864,012.15 × 520,020.90
  4. Step 4: Simplify right side
    576,008.10x = 449,304,375,853.94
  5. Step 5: Solve for x
    x = 449,304,375,853.94/576,008.10
  6. Step 6: Final answer
    x = 780,031.35

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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.