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Finding the Fourth Proportional to 287,801.40, 431,702.10 and 217,817.40

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Solution

The fourth proportional to 287,801.40, 431,702.10 and 217,817.40 is: 326,726.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,801.40 : 431,702.10 = 217,817.40 : x
  2. Step 2: Convert to fraction form
    287,801.40/431,702.10 = 217,817.40/x
  3. Step 3: Cross multiply
    287,801.40x = 431,702.10 × 217,817.40
  4. Step 4: Simplify right side
    287,801.40x = 94,032,228,996.54
  5. Step 5: Solve for x
    x = 94,032,228,996.54/287,801.40
  6. Step 6: Final answer
    x = 326,726.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.