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Finding the Fourth Proportional to 662,105.80, 993,158.70 and 425,715.40

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Solution

The fourth proportional to 662,105.80, 993,158.70 and 425,715.40 is: 638,573.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,105.80 : 993,158.70 = 425,715.40 : x
  2. Step 2: Convert to fraction form
    662,105.80/993,158.70 = 425,715.40/x
  3. Step 3: Cross multiply
    662,105.80x = 993,158.70 × 425,715.40
  4. Step 4: Simplify right side
    662,105.80x = 422,802,953,233.98
  5. Step 5: Solve for x
    x = 422,802,953,233.98/662,105.80
  6. Step 6: Final answer
    x = 638,573.10

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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.