Home / 648,167.20-972,121.20-311,207.20

Finding the Fourth Proportional to 648,167.20, 972,121.20 and 311,207.20

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Solution

The fourth proportional to 648,167.20, 972,121.20 and 311,207.20 is: 466,748.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,167.20 : 972,121.20 = 311,207.20 : x
  2. Step 2: Convert to fraction form
    648,167.20/972,121.20 = 311,207.20/x
  3. Step 3: Cross multiply
    648,167.20x = 972,121.20 × 311,207.20
  4. Step 4: Simplify right side
    648,167.20x = 302,531,116,712.64
  5. Step 5: Solve for x
    x = 302,531,116,712.64/648,167.20
  6. Step 6: Final answer
    x = 466,748.57

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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.