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Finding the Fourth Proportional to 210,483.20, 315,724.80 and 126,502.40

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Solution

The fourth proportional to 210,483.20, 315,724.80 and 126,502.40 is: 189,753.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,483.20 : 315,724.80 = 126,502.40 : x
  2. Step 2: Convert to fraction form
    210,483.20/315,724.80 = 126,502.40/x
  3. Step 3: Cross multiply
    210,483.20x = 315,724.80 × 126,502.40
  4. Step 4: Simplify right side
    210,483.20x = 39,939,944,939.52
  5. Step 5: Solve for x
    x = 39,939,944,939.52/210,483.20
  6. Step 6: Final answer
    x = 189,753.60

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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.