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Finding the Fourth Proportional to 439,206.87, 658,803.38 and 139,683.12

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Solution

The fourth proportional to 439,206.87, 658,803.38 and 139,683.12 is: 209,522.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,206.87 : 658,803.38 = 139,683.12 : x
  2. Step 2: Convert to fraction form
    439,206.87/658,803.38 = 139,683.12/x
  3. Step 3: Cross multiply
    439,206.87x = 658,803.38 × 139,683.12
  4. Step 4: Simplify right side
    439,206.87x = 92,023,710,886.53
  5. Step 5: Solve for x
    x = 92,023,710,886.53/439,206.87
  6. Step 6: Final answer
    x = 209,522.48

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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.