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Finding the Fourth Proportional to 720,740.77, 994,546.15 and 398,398.84

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Solution

The fourth proportional to 720,740.77, 994,546.15 and 398,398.84 is: 549,748.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,740.77 : 994,546.15 = 398,398.84 : x
  2. Step 2: Convert to fraction form
    720,740.77/994,546.15 = 398,398.84/x
  3. Step 3: Cross multiply
    720,740.77x = 994,546.15 × 398,398.84
  4. Step 4: Simplify right side
    720,740.77x = 396,226,032,486.47
  5. Step 5: Solve for x
    x = 396,226,032,486.47/720,740.77
  6. Step 6: Final answer
    x = 549,748.33

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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.