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Finding the Fourth Proportional to 615,147.10, 922,720.65 and 171,915.10

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Solution

The fourth proportional to 615,147.10, 922,720.65 and 171,915.10 is: 257,872.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,147.10 : 922,720.65 = 171,915.10 : x
  2. Step 2: Convert to fraction form
    615,147.10/922,720.65 = 171,915.10/x
  3. Step 3: Cross multiply
    615,147.10x = 922,720.65 × 171,915.10
  4. Step 4: Simplify right side
    615,147.10x = 158,629,612,816.82
  5. Step 5: Solve for x
    x = 158,629,612,816.82/615,147.10
  6. Step 6: Final answer
    x = 257,872.65

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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.