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Finding the Fourth Proportional to 546,821.40, 820,232.10 and 398,105.40

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Solution

The fourth proportional to 546,821.40, 820,232.10 and 398,105.40 is: 597,158.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    546,821.40 : 820,232.10 = 398,105.40 : x
  2. Step 2: Convert to fraction form
    546,821.40/820,232.10 = 398,105.40/x
  3. Step 3: Cross multiply
    546,821.40x = 820,232.10 × 398,105.40
  4. Step 4: Simplify right side
    546,821.40x = 326,538,828,263.34
  5. Step 5: Solve for x
    x = 326,538,828,263.34/546,821.40
  6. Step 6: Final answer
    x = 597,158.10

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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.