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Finding the Fourth Proportional to 661,008.60, 991,658.70 and 211,750.20

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Solution

The fourth proportional to 661,008.60, 991,658.70 and 211,750.20 is: 317,672.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,008.60 : 991,658.70 = 211,750.20 : x
  2. Step 2: Convert to fraction form
    661,008.60/991,658.70 = 211,750.20/x
  3. Step 3: Cross multiply
    661,008.60x = 991,658.70 × 211,750.20
  4. Step 4: Simplify right side
    661,008.60x = 209,983,928,056.74
  5. Step 5: Solve for x
    x = 209,983,928,056.74/661,008.60
  6. Step 6: Final answer
    x = 317,672.01

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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.