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Finding the Fourth Proportional to 388,792.16, 583,100.75 and 139,474.16

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Solution

The fourth proportional to 388,792.16, 583,100.75 and 139,474.16 is: 209,179.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,792.16 : 583,100.75 = 139,474.16 : x
  2. Step 2: Convert to fraction form
    388,792.16/583,100.75 = 139,474.16/x
  3. Step 3: Cross multiply
    388,792.16x = 583,100.75 × 139,474.16
  4. Step 4: Simplify right side
    388,792.16x = 81,327,487,301.62
  5. Step 5: Solve for x
    x = 81,327,487,301.62/388,792.16
  6. Step 6: Final answer
    x = 209,179.85

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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.