Home / 390,770.56-539,008.32-247,381.12

Finding the Fourth Proportional to 390,770.56, 539,008.32 and 247,381.12

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Solution

The fourth proportional to 390,770.56, 539,008.32 and 247,381.12 is: 341,224.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,770.56 : 539,008.32 = 247,381.12 : x
  2. Step 2: Convert to fraction form
    390,770.56/539,008.32 = 247,381.12/x
  3. Step 3: Cross multiply
    390,770.56x = 539,008.32 × 247,381.12
  4. Step 4: Simplify right side
    390,770.56x = 133,340,481,890.92
  5. Step 5: Solve for x
    x = 133,340,481,890.92/390,770.56
  6. Step 6: Final answer
    x = 341,224.48

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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.