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Finding the Fourth Proportional to 390,602.50, 539,088.97 and 247,375.86

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Solution

The fourth proportional to 390,602.50, 539,088.97 and 247,375.86 is: 341,415.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,602.50 : 539,088.97 = 247,375.86 : x
  2. Step 2: Convert to fraction form
    390,602.50/539,088.97 = 247,375.86/x
  3. Step 3: Cross multiply
    390,602.50x = 539,088.97 × 247,375.86
  4. Step 4: Simplify right side
    390,602.50x = 133,357,597,570.26
  5. Step 5: Solve for x
    x = 133,357,597,570.26/390,602.50
  6. Step 6: Final answer
    x = 341,415.12

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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.