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Finding the Fourth Proportional to 208,280.60, 287,427.16 and 112,787.27

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Solution

The fourth proportional to 208,280.60, 287,427.16 and 112,787.27 is: 155,646.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,280.60 : 287,427.16 = 112,787.27 : x
  2. Step 2: Convert to fraction form
    208,280.60/287,427.16 = 112,787.27/x
  3. Step 3: Cross multiply
    208,280.60x = 287,427.16 × 112,787.27
  4. Step 4: Simplify right side
    208,280.60x = 32,418,124,700.25
  5. Step 5: Solve for x
    x = 32,418,124,700.25/208,280.60
  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.