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Finding the Fourth Proportional to 665,612.40, 918,544.92 and 363,806.40

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Solution

The fourth proportional to 665,612.40, 918,544.92 and 363,806.40 is: 502,052.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,612.40 : 918,544.92 = 363,806.40 : x
  2. Step 2: Convert to fraction form
    665,612.40/918,544.92 = 363,806.40/x
  3. Step 3: Cross multiply
    665,612.40x = 918,544.92 × 363,806.40
  4. Step 4: Simplify right side
    665,612.40x = 334,172,520,583.49
  5. Step 5: Solve for x
    x = 334,172,520,583.49/665,612.40
  6. Step 6: Final answer
    x = 502,052.73

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Similar ratio
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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.