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Finding the Fourth Proportional to 279,603.90, 385,857.78 and 152,279.40

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Solution

The fourth proportional to 279,603.90, 385,857.78 and 152,279.40 is: 210,147.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,603.90 : 385,857.78 = 152,279.40 : x
  2. Step 2: Convert to fraction form
    279,603.90/385,857.78 = 152,279.40/x
  3. Step 3: Cross multiply
    279,603.90x = 385,857.78 × 152,279.40
  4. Step 4: Simplify right side
    279,603.90x = 58,758,191,223.73
  5. Step 5: Solve for x
    x = 58,758,191,223.73/279,603.90
  6. Step 6: Final answer
    x = 210,147.97

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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.