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Finding the Fourth Proportional to 487,145.50, 672,214.60 and 272,280.64

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Solution

The fourth proportional to 487,145.50, 672,214.60 and 272,280.64 is: 375,721.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,145.50 : 672,214.60 = 272,280.64 : x
  2. Step 2: Convert to fraction form
    487,145.50/672,214.60 = 272,280.64/x
  3. Step 3: Cross multiply
    487,145.50x = 672,214.60 × 272,280.64
  4. Step 4: Simplify right side
    487,145.50x = 183,031,021,505.34
  5. Step 5: Solve for x
    x = 183,031,021,505.34/487,145.50
  6. Step 6: Final answer
    x = 375,721.47

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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.