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Finding the Fourth Proportional to 542,987.75, 749,432.15 and 313,582.39

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Solution

The fourth proportional to 542,987.75, 749,432.15 and 313,582.39 is: 432,806.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,987.75 : 749,432.15 = 313,582.39 : x
  2. Step 2: Convert to fraction form
    542,987.75/749,432.15 = 313,582.39/x
  3. Step 3: Cross multiply
    542,987.75x = 749,432.15 × 313,582.39
  4. Step 4: Simplify right side
    542,987.75x = 235,008,722,474.28
  5. Step 5: Solve for x
    x = 235,008,722,474.28/542,987.75
  6. Step 6: Final answer
    x = 432,806.67

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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.