Home / 428,100.52-639,547.25-277,110.76

Finding the Fourth Proportional to 428,100.52, 639,547.25 and 277,110.76

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Solution

The fourth proportional to 428,100.52, 639,547.25 and 277,110.76 is: 413,980.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,100.52 : 639,547.25 = 277,110.76 : x
  2. Step 2: Convert to fraction form
    428,100.52/639,547.25 = 277,110.76/x
  3. Step 3: Cross multiply
    428,100.52x = 639,547.25 × 277,110.76
  4. Step 4: Simplify right side
    428,100.52x = 177,225,424,503.41
  5. Step 5: Solve for x
    x = 177,225,424,503.41/428,100.52
  6. Step 6: Final answer
    x = 413,980.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.