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Finding the Fourth Proportional to 279,018.40, 385,041.16 and 151,692.88

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Solution

The fourth proportional to 279,018.40, 385,041.16 and 151,692.88 is: 209,333.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,018.40 : 385,041.16 = 151,692.88 : x
  2. Step 2: Convert to fraction form
    279,018.40/385,041.16 = 151,692.88/x
  3. Step 3: Cross multiply
    279,018.40x = 385,041.16 × 151,692.88
  4. Step 4: Simplify right side
    279,018.40x = 58,408,002,478.94
  5. Step 5: Solve for x
    x = 58,408,002,478.94/279,018.40
  6. Step 6: Final answer
    x = 209,333.87

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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.