Home / 272,615.10-408,047.85-213,128.70

Finding the Fourth Proportional to 272,615.10, 408,047.85 and 213,128.70

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Solution

The fourth proportional to 272,615.10, 408,047.85 and 213,128.70 is: 319,009.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,615.10 : 408,047.85 = 213,128.70 : x
  2. Step 2: Convert to fraction form
    272,615.10/408,047.85 = 213,128.70/x
  3. Step 3: Cross multiply
    272,615.10x = 408,047.85 × 213,128.70
  4. Step 4: Simplify right side
    272,615.10x = 86,966,707,808.30
  5. Step 5: Solve for x
    x = 86,966,707,808.30/272,615.10
  6. Step 6: Final answer
    x = 319,009.14

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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.