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Finding the Fourth Proportional to 839,393.10, 1,158,358.83 and 457,419.90

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Solution

The fourth proportional to 839,393.10, 1,158,358.83 and 457,419.90 is: 631,237.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,393.10 : 1,158,358.83 = 457,419.90 : x
  2. Step 2: Convert to fraction form
    839,393.10/1,158,358.83 = 457,419.90/x
  3. Step 3: Cross multiply
    839,393.10x = 1,158,358.83 × 457,419.90
  4. Step 4: Simplify right side
    839,393.10x = 529,856,380,182.72
  5. Step 5: Solve for x
    x = 529,856,380,182.72/839,393.10
  6. Step 6: Final answer
    x = 631,237.47

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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.