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Finding the Fourth Proportional to 582,078.39, 873,680.67 and 420,139.38

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Solution

The fourth proportional to 582,078.39, 873,680.67 and 420,139.38 is: 630,615.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    582,078.39 : 873,680.67 = 420,139.38 : x
  2. Step 2: Convert to fraction form
    582,078.39/873,680.67 = 420,139.38/x
  3. Step 3: Cross multiply
    582,078.39x = 873,680.67 × 420,139.38
  4. Step 4: Simplify right side
    582,078.39x = 367,067,655,011.79
  5. Step 5: Solve for x
    x = 367,067,655,011.79/582,078.39
  6. Step 6: Final answer
    x = 630,615.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.