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Finding the Fourth Proportional to 210,221.20, 315,331.80 and 207,456.40

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Solution

The fourth proportional to 210,221.20, 315,331.80 and 207,456.40 is: 311,184.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,221.20 : 315,331.80 = 207,456.40 : x
  2. Step 2: Convert to fraction form
    210,221.20/315,331.80 = 207,456.40/x
  3. Step 3: Cross multiply
    210,221.20x = 315,331.80 × 207,456.40
  4. Step 4: Simplify right side
    210,221.20x = 65,417,600,033.52
  5. Step 5: Solve for x
    x = 65,417,600,033.52/210,221.20
  6. Step 6: Final answer
    x = 311,184.60

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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.