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Finding the Fourth Proportional to 280,503.76, 420,791.98 and 128,664.22

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Solution

The fourth proportional to 280,503.76, 420,791.98 and 128,664.22 is: 193,013.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,503.76 : 420,791.98 = 128,664.22 : x
  2. Step 2: Convert to fraction form
    280,503.76/420,791.98 = 128,664.22/x
  3. Step 3: Cross multiply
    280,503.76x = 420,791.98 × 128,664.22
  4. Step 4: Simplify right side
    280,503.76x = 54,140,872,186.22
  5. Step 5: Solve for x
    x = 54,140,872,186.22/280,503.76
  6. Step 6: Final answer
    x = 193,013.00

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1.5x scale

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.