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Finding the Fourth Proportional to 615,215.70, 922,823.55 and 447,910.20

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Solution

The fourth proportional to 615,215.70, 922,823.55 and 447,910.20 is: 671,865.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,215.70 : 922,823.55 = 447,910.20 : x
  2. Step 2: Convert to fraction form
    615,215.70/922,823.55 = 447,910.20/x
  3. Step 3: Cross multiply
    615,215.70x = 922,823.55 × 447,910.20
  4. Step 4: Simplify right side
    615,215.70x = 413,342,080,845.21
  5. Step 5: Solve for x
    x = 413,342,080,845.21/615,215.70
  6. Step 6: Final answer
    x = 671,865.30

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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.