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Finding the Fourth Proportional to 456,438.30, 684,657.45 and 279,291.30

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Solution

The fourth proportional to 456,438.30, 684,657.45 and 279,291.30 is: 418,936.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,438.30 : 684,657.45 = 279,291.30 : x
  2. Step 2: Convert to fraction form
    456,438.30/684,657.45 = 279,291.30/x
  3. Step 3: Cross multiply
    456,438.30x = 684,657.45 × 279,291.30
  4. Step 4: Simplify right side
    456,438.30x = 191,218,869,265.19
  5. Step 5: Solve for x
    x = 191,218,869,265.19/456,438.30
  6. Step 6: Final answer
    x = 418,936.95

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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.