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Finding the Fourth Proportional to 387,479.69, 534,701.41 and 217,702.88

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Solution

The fourth proportional to 387,479.69, 534,701.41 and 217,702.88 is: 300,418.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,479.69 : 534,701.41 = 217,702.88 : x
  2. Step 2: Convert to fraction form
    387,479.69/534,701.41 = 217,702.88/x
  3. Step 3: Cross multiply
    387,479.69x = 534,701.41 × 217,702.88
  4. Step 4: Simplify right side
    387,479.69x = 116,406,036,897.06
  5. Step 5: Solve for x
    x = 116,406,036,897.06/387,479.69
  6. Step 6: Final answer
    x = 300,418.42

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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.