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Finding the Fourth Proportional to 391,521.30, 587,281.95 and 265,222.05

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Solution

The fourth proportional to 391,521.30, 587,281.95 and 265,222.05 is: 397,833.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,521.30 : 587,281.95 = 265,222.05 : x
  2. Step 2: Convert to fraction form
    391,521.30/587,281.95 = 265,222.05/x
  3. Step 3: Cross multiply
    391,521.30x = 587,281.95 × 265,222.05
  4. Step 4: Simplify right side
    391,521.30x = 155,760,122,707.00
  5. Step 5: Solve for x
    x = 155,760,122,707.00/391,521.30
  6. Step 6: Final answer
    x = 397,833.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.