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Finding the Fourth Proportional to 720,617.46, 994,434.56 and 398,319.26

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Solution

The fourth proportional to 720,617.46, 994,434.56 and 398,319.26 is: 549,670.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,617.46 : 994,434.56 = 398,319.26 : x
  2. Step 2: Convert to fraction form
    720,617.46/994,434.56 = 398,319.26/x
  3. Step 3: Cross multiply
    720,617.46x = 994,434.56 × 398,319.26
  4. Step 4: Simplify right side
    720,617.46x = 396,102,438,057.63
  5. Step 5: Solve for x
    x = 396,102,438,057.63/720,617.46
  6. Step 6: Final answer
    x = 549,670.89

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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.