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Finding the Fourth Proportional to 715,994.64, 988,098 and 393,729.24

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Solution

The fourth proportional to 715,994.64, 988,098 and 393,729.24 is: 543,360.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,994.64 : 988,098 = 393,729.24 : x
  2. Step 2: Convert to fraction form
    715,994.64/988,098 = 393,729.24/x
  3. Step 3: Cross multiply
    715,994.64x = 988,098 × 393,729.24
  4. Step 4: Simplify right side
    715,994.64x = 389,043,074,585.52
  5. Step 5: Solve for x
    x = 389,043,074,585.52/715,994.64
  6. Step 6: Final answer
    x = 543,360.32

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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.