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Finding the Fourth Proportional to 280,860.55, 387,492.92 and 159,916.30

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Solution

The fourth proportional to 280,860.55, 387,492.92 and 159,916.30 is: 220,630.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,860.55 : 387,492.92 = 159,916.30 : x
  2. Step 2: Convert to fraction form
    280,860.55/387,492.92 = 159,916.30/x
  3. Step 3: Cross multiply
    280,860.55x = 387,492.92 × 159,916.30
  4. Step 4: Simplify right side
    280,860.55x = 61,966,434,042.60
  5. Step 5: Solve for x
    x = 61,966,434,042.60/280,860.55
  6. Step 6: Final answer
    x = 220,630.61

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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.