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Finding the Fourth Proportional to 279,980.28, 386,378.88 and 152,656.38

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Solution

The fourth proportional to 279,980.28, 386,378.88 and 152,656.38 is: 210,669.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,980.28 : 386,378.88 = 152,656.38 : x
  2. Step 2: Convert to fraction form
    279,980.28/386,378.88 = 152,656.38/x
  3. Step 3: Cross multiply
    279,980.28x = 386,378.88 × 152,656.38
  4. Step 4: Simplify right side
    279,980.28x = 58,983,201,129.25
  5. Step 5: Solve for x
    x = 58,983,201,129.25/279,980.28
  6. Step 6: Final answer
    x = 210,669.13

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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.