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Finding the Fourth Proportional to 279,465.93, 385,612.20 and 158,612.31

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Solution

The fourth proportional to 279,465.93, 385,612.20 and 158,612.31 is: 218,856.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,465.93 : 385,612.20 = 158,612.31 : x
  2. Step 2: Convert to fraction form
    279,465.93/385,612.20 = 158,612.31/x
  3. Step 3: Cross multiply
    279,465.93x = 385,612.20 × 158,612.31
  4. Step 4: Simplify right side
    279,465.93x = 61,162,841,806.18
  5. Step 5: Solve for x
    x = 61,162,841,806.18/279,465.93
  6. Step 6: Final answer
    x = 218,856.17

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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.