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Finding the Fourth Proportional to 210,031.20, 315,046.80 and 207,266.40

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Solution

The fourth proportional to 210,031.20, 315,046.80 and 207,266.40 is: 310,899.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,031.20 : 315,046.80 = 207,266.40 : x
  2. Step 2: Convert to fraction form
    210,031.20/315,046.80 = 207,266.40/x
  3. Step 3: Cross multiply
    210,031.20x = 315,046.80 × 207,266.40
  4. Step 4: Simplify right side
    210,031.20x = 65,298,616,067.52
  5. Step 5: Solve for x
    x = 65,298,616,067.52/210,031.20
  6. Step 6: Final answer
    x = 310,899.60

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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.