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Finding the Fourth Proportional to 487,051.38, 672,129.36 and 272,191.32

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Solution

The fourth proportional to 487,051.38, 672,129.36 and 272,191.32 is: 375,623.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,051.38 : 672,129.36 = 272,191.32 : x
  2. Step 2: Convert to fraction form
    487,051.38/672,129.36 = 272,191.32/x
  3. Step 3: Cross multiply
    487,051.38x = 672,129.36 × 272,191.32
  4. Step 4: Simplify right side
    487,051.38x = 182,947,777,709.16
  5. Step 5: Solve for x
    x = 182,947,777,709.16/487,051.38
  6. Step 6: Final answer
    x = 375,623.16

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1.5x scale

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.