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Finding the Fourth Proportional to 212,342.40, 318,988.80 and 177,350.40

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Solution

The fourth proportional to 212,342.40, 318,988.80 and 177,350.40 is: 266,422.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,342.40 : 318,988.80 = 177,350.40 : x
  2. Step 2: Convert to fraction form
    212,342.40/318,988.80 = 177,350.40/x
  3. Step 3: Cross multiply
    212,342.40x = 318,988.80 × 177,350.40
  4. Step 4: Simplify right side
    212,342.40x = 56,572,791,275.52
  5. Step 5: Solve for x
    x = 56,572,791,275.52/212,342.40
  6. Step 6: Final answer
    x = 266,422.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.