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Finding the Fourth Proportional to 672,280.10, 1,008,420.15 and 520,064.90

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Solution

The fourth proportional to 672,280.10, 1,008,420.15 and 520,064.90 is: 780,097.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,280.10 : 1,008,420.15 = 520,064.90 : x
  2. Step 2: Convert to fraction form
    672,280.10/1,008,420.15 = 520,064.90/x
  3. Step 3: Cross multiply
    672,280.10x = 1,008,420.15 × 520,064.90
  4. Step 4: Simplify right side
    672,280.10x = 524,443,924,467.74
  5. Step 5: Solve for x
    x = 524,443,924,467.74/672,280.10
  6. Step 6: Final answer
    x = 780,097.35

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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.