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Finding the Fourth Proportional to 612,228.70, 918,343.05 and 442,954.90

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Solution

The fourth proportional to 612,228.70, 918,343.05 and 442,954.90 is: 664,432.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,228.70 : 918,343.05 = 442,954.90 : x
  2. Step 2: Convert to fraction form
    612,228.70/918,343.05 = 442,954.90/x
  3. Step 3: Cross multiply
    612,228.70x = 918,343.05 × 442,954.90
  4. Step 4: Simplify right side
    612,228.70x = 406,784,553,878.45
  5. Step 5: Solve for x
    x = 406,784,553,878.45/612,228.70
  6. Step 6: Final answer
    x = 664,432.35

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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.