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Finding the Fourth Proportional to 720,911.16, 994,770 and 398,577.24

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Solution

The fourth proportional to 720,911.16, 994,770 and 398,577.24 is: 549,988.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,911.16 : 994,770 = 398,577.24 : x
  2. Step 2: Convert to fraction form
    720,911.16/994,770 = 398,577.24/x
  3. Step 3: Cross multiply
    720,911.16x = 994,770 × 398,577.24
  4. Step 4: Simplify right side
    720,911.16x = 396,492,681,034.80
  5. Step 5: Solve for x
    x = 396,492,681,034.80/720,911.16
  6. Step 6: Final answer
    x = 549,988.27

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.