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Finding the Fourth Proportional to 438,520.32, 657,676.80 and 201,715.20

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Solution

The fourth proportional to 438,520.32, 657,676.80 and 201,715.20 is: 302,525.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,520.32 : 657,676.80 = 201,715.20 : x
  2. Step 2: Convert to fraction form
    438,520.32/657,676.80 = 201,715.20/x
  3. Step 3: Cross multiply
    438,520.32x = 657,676.80 × 201,715.20
  4. Step 4: Simplify right side
    438,520.32x = 132,663,407,247.36
  5. Step 5: Solve for x
    x = 132,663,407,247.36/438,520.32
  6. Step 6: Final answer
    x = 302,525.11

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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.