Home / 310,715.46-428,769.05-172,890.72

Finding the Fourth Proportional to 310,715.46, 428,769.05 and 172,890.72

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Solution

The fourth proportional to 310,715.46, 428,769.05 and 172,890.72 is: 238,579.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,715.46 : 428,769.05 = 172,890.72 : x
  2. Step 2: Convert to fraction form
    310,715.46/428,769.05 = 172,890.72/x
  3. Step 3: Cross multiply
    310,715.46x = 428,769.05 × 172,890.72
  4. Step 4: Simplify right side
    310,715.46x = 74,130,188,903.76
  5. Step 5: Solve for x
    x = 74,130,188,903.76/310,715.46
  6. Step 6: Final answer
    x = 238,579.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.