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Finding the Fourth Proportional to 208,280.61, 287,427.17 and 112,787.28

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Solution

The fourth proportional to 208,280.61, 287,427.17 and 112,787.28 is: 155,646.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,280.61 : 287,427.17 = 112,787.28 : x
  2. Step 2: Convert to fraction form
    208,280.61/287,427.17 = 112,787.28/x
  3. Step 3: Cross multiply
    208,280.61x = 287,427.17 × 112,787.28
  4. Step 4: Simplify right side
    208,280.61x = 32,418,128,138.46
  5. Step 5: Solve for x
    x = 32,418,128,138.46/208,280.61
  6. Step 6: Final answer
    x = 155,646.40

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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.