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Finding the Fourth Proportional to 280,717.53, 387,391.17 and 153,393.12

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Solution

The fourth proportional to 280,717.53, 387,391.17 and 153,393.12 is: 211,683.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,717.53 : 387,391.17 = 153,393.12 : x
  2. Step 2: Convert to fraction form
    280,717.53/387,391.17 = 153,393.12/x
  3. Step 3: Cross multiply
    280,717.53x = 387,391.17 × 153,393.12
  4. Step 4: Simplify right side
    280,717.53x = 59,423,140,226.75
  5. Step 5: Solve for x
    x = 59,423,140,226.75/280,717.53
  6. Step 6: Final answer
    x = 211,683.04

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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.