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Finding the Fourth Proportional to 704,517.12, 972,211.68 and 398,570.40

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Solution

The fourth proportional to 704,517.12, 972,211.68 and 398,570.40 is: 550,014.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,517.12 : 972,211.68 = 398,570.40 : x
  2. Step 2: Convert to fraction form
    704,517.12/972,211.68 = 398,570.40/x
  3. Step 3: Cross multiply
    704,517.12x = 972,211.68 × 398,570.40
  4. Step 4: Simplify right side
    704,517.12x = 387,494,798,182.27
  5. Step 5: Solve for x
    x = 387,494,798,182.27/704,517.12
  6. Step 6: Final answer
    x = 550,014.74

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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.