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Finding the Fourth Proportional to 280,692.34, 387,355.10 and 151,630.79

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Solution

The fourth proportional to 280,692.34, 387,355.10 and 151,630.79 is: 209,250.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,692.34 : 387,355.10 = 151,630.79 : x
  2. Step 2: Convert to fraction form
    280,692.34/387,355.10 = 151,630.79/x
  3. Step 3: Cross multiply
    280,692.34x = 387,355.10 × 151,630.79
  4. Step 4: Simplify right side
    280,692.34x = 58,734,957,128.60
  5. Step 5: Solve for x
    x = 58,734,957,128.60/280,692.34
  6. Step 6: Final answer
    x = 209,250.30

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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.