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Finding the Fourth Proportional to 708,520.14, 977,708.88 and 398,469.15

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Solution

The fourth proportional to 708,520.14, 977,708.88 and 398,469.15 is: 549,859.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,520.14 : 977,708.88 = 398,469.15 : x
  2. Step 2: Convert to fraction form
    708,520.14/977,708.88 = 398,469.15/x
  3. Step 3: Cross multiply
    708,520.14x = 977,708.88 × 398,469.15
  4. Step 4: Simplify right side
    708,520.14x = 389,586,826,361.05
  5. Step 5: Solve for x
    x = 389,586,826,361.05/708,520.14
  6. Step 6: Final answer
    x = 549,859.92

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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.