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Finding the Fourth Proportional to 553,114.80, 829,672.20 and 287,394.30

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Solution

The fourth proportional to 553,114.80, 829,672.20 and 287,394.30 is: 431,091.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,114.80 : 829,672.20 = 287,394.30 : x
  2. Step 2: Convert to fraction form
    553,114.80/829,672.20 = 287,394.30/x
  3. Step 3: Cross multiply
    553,114.80x = 829,672.20 × 287,394.30
  4. Step 4: Simplify right side
    553,114.80x = 238,443,061,148.46
  5. Step 5: Solve for x
    x = 238,443,061,148.46/553,114.80
  6. Step 6: Final answer
    x = 431,091.45

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Similar ratio
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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.