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Finding the Fourth Proportional to 720,723.65, 994,522.52 and 398,381.72

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Solution

The fourth proportional to 720,723.65, 994,522.52 and 398,381.72 is: 549,724.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,723.65 : 994,522.52 = 398,381.72 : x
  2. Step 2: Convert to fraction form
    720,723.65/994,522.52 = 398,381.72/x
  3. Step 3: Cross multiply
    720,723.65x = 994,522.52 × 398,381.72
  4. Step 4: Simplify right side
    720,723.65x = 396,199,588,119.68
  5. Step 5: Solve for x
    x = 396,199,588,119.68/720,723.65
  6. Step 6: Final answer
    x = 549,724.70

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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.