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Finding the Fourth Proportional to 279,462.18, 385,645.71 and 152,138.22

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Solution

The fourth proportional to 279,462.18, 385,645.71 and 152,138.22 is: 209,944.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,462.18 : 385,645.71 = 152,138.22 : x
  2. Step 2: Convert to fraction form
    279,462.18/385,645.71 = 152,138.22/x
  3. Step 3: Cross multiply
    279,462.18x = 385,645.71 × 152,138.22
  4. Step 4: Simplify right side
    279,462.18x = 58,671,451,870.04
  5. Step 5: Solve for x
    x = 58,671,451,870.04/279,462.18
  6. Step 6: Final answer
    x = 209,944.16

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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.