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Finding the Fourth Proportional to 478,679.90, 660,569.69 and 260,890.53

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Solution

The fourth proportional to 478,679.90, 660,569.69 and 260,890.53 is: 360,024.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,679.90 : 660,569.69 = 260,890.53 : x
  2. Step 2: Convert to fraction form
    478,679.90/660,569.69 = 260,890.53/x
  3. Step 3: Cross multiply
    478,679.90x = 660,569.69 × 260,890.53
  4. Step 4: Simplify right side
    478,679.90x = 172,336,375,221.58
  5. Step 5: Solve for x
    x = 172,336,375,221.58/478,679.90
  6. Step 6: Final answer
    x = 360,024.26

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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.