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Finding the Fourth Proportional to 211,871.60, 317,515.80 and 140,591.60

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Solution

The fourth proportional to 211,871.60, 317,515.80 and 140,591.60 is: 210,693.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,871.60 : 317,515.80 = 140,591.60 : x
  2. Step 2: Convert to fraction form
    211,871.60/317,515.80 = 140,591.60/x
  3. Step 3: Cross multiply
    211,871.60x = 317,515.80 × 140,591.60
  4. Step 4: Simplify right side
    211,871.60x = 44,640,054,347.28
  5. Step 5: Solve for x
    x = 44,640,054,347.28/211,871.60
  6. Step 6: Final answer
    x = 210,693.90

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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.