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Finding the Fourth Proportional to 280,915.65, 387,568.63 and 159,971.17

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Solution

The fourth proportional to 280,915.65, 387,568.63 and 159,971.17 is: 220,706.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,915.65 : 387,568.63 = 159,971.17 : x
  2. Step 2: Convert to fraction form
    280,915.65/387,568.63 = 159,971.17/x
  3. Step 3: Cross multiply
    280,915.65x = 387,568.63 × 159,971.17
  4. Step 4: Simplify right side
    280,915.65x = 61,999,807,196.40
  5. Step 5: Solve for x
    x = 61,999,807,196.40/280,915.65
  6. Step 6: Final answer
    x = 220,706.13

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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.