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Finding the Fourth Proportional to 390,942.76, 539,559.03 and 247,716.22

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Solution

The fourth proportional to 390,942.76, 539,559.03 and 247,716.22 is: 341,885.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,942.76 : 539,559.03 = 247,716.22 : x
  2. Step 2: Convert to fraction form
    390,942.76/539,559.03 = 247,716.22/x
  3. Step 3: Cross multiply
    390,942.76x = 539,559.03 × 247,716.22
  4. Step 4: Simplify right side
    390,942.76x = 133,657,523,378.47
  5. Step 5: Solve for x
    x = 133,657,523,378.47/390,942.76
  6. Step 6: Final answer
    x = 341,885.15

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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.