Home / 291,310.11-402,015.56-163,990.35

Finding the Fourth Proportional to 291,310.11, 402,015.56 and 163,990.35

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Solution

The fourth proportional to 291,310.11, 402,015.56 and 163,990.35 is: 226,310.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,310.11 : 402,015.56 = 163,990.35 : x
  2. Step 2: Convert to fraction form
    291,310.11/402,015.56 = 163,990.35/x
  3. Step 3: Cross multiply
    291,310.11x = 402,015.56 × 163,990.35
  4. Step 4: Simplify right side
    291,310.11x = 65,926,671,569.89
  5. Step 5: Solve for x
    x = 65,926,671,569.89/291,310.11
  6. Step 6: Final answer
    x = 226,310.96

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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.