Home / 378,439.12-515,250.10-377,258.14

Finding the Fourth Proportional to 378,439.12, 515,250.10 and 377,258.14

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Solution

The fourth proportional to 378,439.12, 515,250.10 and 377,258.14 is: 513,642.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,439.12 : 515,250.10 = 377,258.14 : x
  2. Step 2: Convert to fraction form
    378,439.12/515,250.10 = 377,258.14/x
  3. Step 3: Cross multiply
    378,439.12x = 515,250.10 × 377,258.14
  4. Step 4: Simplify right side
    378,439.12x = 194,382,294,360.81
  5. Step 5: Solve for x
    x = 194,382,294,360.81/378,439.12
  6. Step 6: Final answer
    x = 513,642.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.