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Finding the Fourth Proportional to 720,748.32, 994,660.74 and 478,613.40

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Solution

The fourth proportional to 720,748.32, 994,660.74 and 478,613.40 is: 660,505.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,748.32 : 994,660.74 = 478,613.40 : x
  2. Step 2: Convert to fraction form
    720,748.32/994,660.74 = 478,613.40/x
  3. Step 3: Cross multiply
    720,748.32x = 994,660.74 × 478,613.40
  4. Step 4: Simplify right side
    720,748.32x = 476,057,958,617.92
  5. Step 5: Solve for x
    x = 476,057,958,617.92/720,748.32
  6. Step 6: Final answer
    x = 660,505.12

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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.