Home / 280,915.28-387,568.13-159,970.81

Finding the Fourth Proportional to 280,915.28, 387,568.13 and 159,970.81

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Solution

The fourth proportional to 280,915.28, 387,568.13 and 159,970.81 is: 220,705.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,915.28 : 387,568.13 = 159,970.81 : x
  2. Step 2: Convert to fraction form
    280,915.28/387,568.13 = 159,970.81/x
  3. Step 3: Cross multiply
    280,915.28x = 387,568.13 × 159,970.81
  4. Step 4: Simplify right side
    280,915.28x = 61,999,587,117.29
  5. Step 5: Solve for x
    x = 61,999,587,117.29/280,915.28
  6. Step 6: Final answer
    x = 220,705.64

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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.