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Finding the Fourth Proportional to 211,247.60, 316,871.40 and 127,266.80

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Solution

The fourth proportional to 211,247.60, 316,871.40 and 127,266.80 is: 190,900.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,247.60 : 316,871.40 = 127,266.80 : x
  2. Step 2: Convert to fraction form
    211,247.60/316,871.40 = 127,266.80/x
  3. Step 3: Cross multiply
    211,247.60x = 316,871.40 × 127,266.80
  4. Step 4: Simplify right side
    211,247.60x = 40,327,209,089.52
  5. Step 5: Solve for x
    x = 40,327,209,089.52/211,247.60
  6. Step 6: Final answer
    x = 190,900.20

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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.