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Finding the Fourth Proportional to 210,644.28, 315,966.36 and 84,341.40

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Solution

The fourth proportional to 210,644.28, 315,966.36 and 84,341.40 is: 126,512.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,644.28 : 315,966.36 = 84,341.40 : x
  2. Step 2: Convert to fraction form
    210,644.28/315,966.36 = 84,341.40/x
  3. Step 3: Cross multiply
    210,644.28x = 315,966.36 × 84,341.40
  4. Step 4: Simplify right side
    210,644.28x = 26,649,045,155.30
  5. Step 5: Solve for x
    x = 26,649,045,155.30/210,644.28
  6. Step 6: Final answer
    x = 126,512.08

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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.