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Finding the Fourth Proportional to 498,410.13, 687,805.80 and 272,055.63

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Solution

The fourth proportional to 498,410.13, 687,805.80 and 272,055.63 is: 375,436.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,410.13 : 687,805.80 = 272,055.63 : x
  2. Step 2: Convert to fraction form
    498,410.13/687,805.80 = 272,055.63/x
  3. Step 3: Cross multiply
    498,410.13x = 687,805.80 × 272,055.63
  4. Step 4: Simplify right side
    498,410.13x = 187,121,440,236.65
  5. Step 5: Solve for x
    x = 187,121,440,236.65/498,410.13
  6. Step 6: Final answer
    x = 375,436.67

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1.5x scale

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.