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Finding the Fourth Proportional to 399,663.95, 551,780.61 and 260,095.53

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Solution

The fourth proportional to 399,663.95, 551,780.61 and 260,095.53 is: 359,090.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,663.95 : 551,780.61 = 260,095.53 : x
  2. Step 2: Convert to fraction form
    399,663.95/551,780.61 = 260,095.53/x
  3. Step 3: Cross multiply
    399,663.95x = 551,780.61 × 260,095.53
  4. Step 4: Simplify right side
    399,663.95x = 143,515,672,270.85
  5. Step 5: Solve for x
    x = 143,515,672,270.85/399,663.95
  6. Step 6: Final answer
    x = 359,090.86

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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.