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Finding the Fourth Proportional to 612,226.70, 918,340.05 and 442,952.90

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Solution

The fourth proportional to 612,226.70, 918,340.05 and 442,952.90 is: 664,429.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,226.70 : 918,340.05 = 442,952.90 : x
  2. Step 2: Convert to fraction form
    612,226.70/918,340.05 = 442,952.90/x
  3. Step 3: Cross multiply
    612,226.70x = 918,340.05 × 442,952.90
  4. Step 4: Simplify right side
    612,226.70x = 406,781,388,333.65
  5. Step 5: Solve for x
    x = 406,781,388,333.65/612,226.70
  6. Step 6: Final answer
    x = 664,429.35

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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.