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Finding the Fourth Proportional to 553,314.80, 829,972.20 and 287,594.30

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Solution

The fourth proportional to 553,314.80, 829,972.20 and 287,594.30 is: 431,391.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,314.80 : 829,972.20 = 287,594.30 : x
  2. Step 2: Convert to fraction form
    553,314.80/829,972.20 = 287,594.30/x
  3. Step 3: Cross multiply
    553,314.80x = 829,972.20 × 287,594.30
  4. Step 4: Simplify right side
    553,314.80x = 238,695,273,878.46
  5. Step 5: Solve for x
    x = 238,695,273,878.46/553,314.80
  6. Step 6: Final answer
    x = 431,391.45

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Double scale
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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.