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Finding the Fourth Proportional to 508,431.84, 701,612.12 and 278,983.92

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Solution

The fourth proportional to 508,431.84, 701,612.12 and 278,983.92 is: 384,984.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,431.84 : 701,612.12 = 278,983.92 : x
  2. Step 2: Convert to fraction form
    508,431.84/701,612.12 = 278,983.92/x
  3. Step 3: Cross multiply
    508,431.84x = 701,612.12 × 278,983.92
  4. Step 4: Simplify right side
    508,431.84x = 195,738,499,557.11
  5. Step 5: Solve for x
    x = 195,738,499,557.11/508,431.84
  6. Step 6: Final answer
    x = 384,984.74

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Double scale
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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.