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Finding the Fourth Proportional to 456,350.76, 687,606.87 and 378,129.47

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Solution

The fourth proportional to 456,350.76, 687,606.87 and 378,129.47 is: 569,746.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,350.76 : 687,606.87 = 378,129.47 : x
  2. Step 2: Convert to fraction form
    456,350.76/687,606.87 = 378,129.47/x
  3. Step 3: Cross multiply
    456,350.76x = 687,606.87 × 378,129.47
  4. Step 4: Simplify right side
    456,350.76x = 260,004,419,301.41
  5. Step 5: Solve for x
    x = 260,004,419,301.41/456,350.76
  6. Step 6: Final answer
    x = 569,746.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.