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Finding the Fourth Proportional to 869,437.80, 1,304,156.70 and 363,911.40

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Solution

The fourth proportional to 869,437.80, 1,304,156.70 and 363,911.40 is: 545,867.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,437.80 : 1,304,156.70 = 363,911.40 : x
  2. Step 2: Convert to fraction form
    869,437.80/1,304,156.70 = 363,911.40/x
  3. Step 3: Cross multiply
    869,437.80x = 1,304,156.70 × 363,911.40
  4. Step 4: Simplify right side
    869,437.80x = 474,597,490,516.38
  5. Step 5: Solve for x
    x = 474,597,490,516.38/869,437.80
  6. Step 6: Final answer
    x = 545,867.10

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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.