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Finding the Fourth Proportional to 750,000.70, 1,121,720.55 and 670,612.60

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Solution

The fourth proportional to 750,000.70, 1,121,720.55 and 670,612.60 is: 1,002,985.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    750,000.70 : 1,121,720.55 = 670,612.60 : x
  2. Step 2: Convert to fraction form
    750,000.70/1,121,720.55 = 670,612.60/x
  3. Step 3: Cross multiply
    750,000.70x = 1,121,720.55 × 670,612.60
  4. Step 4: Simplify right side
    750,000.70x = 752,239,934,508.93
  5. Step 5: Solve for x
    x = 752,239,934,508.93/750,000.70
  6. Step 6: Final answer
    x = 1,002,985.64

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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.