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Finding the Fourth Proportional to 718,002.08, 990,825.80 and 391,325.41

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Solution

The fourth proportional to 718,002.08, 990,825.80 and 391,325.41 is: 540,019.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,002.08 : 990,825.80 = 391,325.41 : x
  2. Step 2: Convert to fraction form
    718,002.08/990,825.80 = 391,325.41/x
  3. Step 3: Cross multiply
    718,002.08x = 990,825.80 × 391,325.41
  4. Step 4: Simplify right side
    718,002.08x = 387,735,313,401.89
  5. Step 5: Solve for x
    x = 387,735,313,401.89/718,002.08
  6. Step 6: Final answer
    x = 540,019.76

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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.