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Finding the Fourth Proportional to 561,668.10, 842,502.15 and 162,321.90

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Solution

The fourth proportional to 561,668.10, 842,502.15 and 162,321.90 is: 243,482.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,668.10 : 842,502.15 = 162,321.90 : x
  2. Step 2: Convert to fraction form
    561,668.10/842,502.15 = 162,321.90/x
  3. Step 3: Cross multiply
    561,668.10x = 842,502.15 × 162,321.90
  4. Step 4: Simplify right side
    561,668.10x = 136,756,549,742.09
  5. Step 5: Solve for x
    x = 136,756,549,742.09/561,668.10
  6. Step 6: Final answer
    x = 243,482.85

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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.