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Finding the Fourth Proportional to 387,089.26, 534,169.47 and 217,330.54

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Solution

The fourth proportional to 387,089.26, 534,169.47 and 217,330.54 is: 299,908.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,089.26 : 534,169.47 = 217,330.54 : x
  2. Step 2: Convert to fraction form
    387,089.26/534,169.47 = 217,330.54/x
  3. Step 3: Cross multiply
    387,089.26x = 534,169.47 × 217,330.54
  4. Step 4: Simplify right side
    387,089.26x = 116,091,339,366.61
  5. Step 5: Solve for x
    x = 116,091,339,366.61/387,089.26
  6. Step 6: Final answer
    x = 299,908.45

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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.