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Finding the Fourth Proportional to 687,372.72, 948,138.12 and 496,666.32

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Solution

The fourth proportional to 687,372.72, 948,138.12 and 496,666.32 is: 685,084.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,372.72 : 948,138.12 = 496,666.32 : x
  2. Step 2: Convert to fraction form
    687,372.72/948,138.12 = 496,666.32/x
  3. Step 3: Cross multiply
    687,372.72x = 948,138.12 × 496,666.32
  4. Step 4: Simplify right side
    687,372.72x = 470,908,270,912.12
  5. Step 5: Solve for x
    x = 470,908,270,912.12/687,372.72
  6. Step 6: Final answer
    x = 685,084.32

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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.