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Finding the Fourth Proportional to 311,136.60, 429,335.64 and 175,168.08

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Solution

The fourth proportional to 311,136.60, 429,335.64 and 175,168.08 is: 241,713.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,136.60 : 429,335.64 = 175,168.08 : x
  2. Step 2: Convert to fraction form
    311,136.60/429,335.64 = 175,168.08/x
  3. Step 3: Cross multiply
    311,136.60x = 429,335.64 × 175,168.08
  4. Step 4: Simplify right side
    311,136.60x = 75,205,899,734.37
  5. Step 5: Solve for x
    x = 75,205,899,734.37/311,136.60
  6. Step 6: Final answer
    x = 241,713.45

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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.