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Finding the Fourth Proportional to 428,728.65, 591,602.90 and 247,498.95

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Solution

The fourth proportional to 428,728.65, 591,602.90 and 247,498.95 is: 341,523.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,728.65 : 591,602.90 = 247,498.95 : x
  2. Step 2: Convert to fraction form
    428,728.65/591,602.90 = 247,498.95/x
  3. Step 3: Cross multiply
    428,728.65x = 591,602.90 × 247,498.95
  4. Step 4: Simplify right side
    428,728.65x = 146,421,095,329.46
  5. Step 5: Solve for x
    x = 146,421,095,329.46/428,728.65
  6. Step 6: Final answer
    x = 341,523.93

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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.