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Finding the Fourth Proportional to 387,702.72, 535,032 and 217,935.36

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Solution

The fourth proportional to 387,702.72, 535,032 and 217,935.36 is: 300,752.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,702.72 : 535,032 = 217,935.36 : x
  2. Step 2: Convert to fraction form
    387,702.72/535,032 = 217,935.36/x
  3. Step 3: Cross multiply
    387,702.72x = 535,032 × 217,935.36
  4. Step 4: Simplify right side
    387,702.72x = 116,602,391,531.52
  5. Step 5: Solve for x
    x = 116,602,391,531.52/387,702.72
  6. Step 6: Final answer
    x = 300,752.06

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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.