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Finding the Fourth Proportional to 520,431.68, 780,022.71 and 267,831.36

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Solution

The fourth proportional to 520,431.68, 780,022.71 and 267,831.36 is: 401,425.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,431.68 : 780,022.71 = 267,831.36 : x
  2. Step 2: Convert to fraction form
    520,431.68/780,022.71 = 267,831.36/x
  3. Step 3: Cross multiply
    520,431.68x = 780,022.71 × 267,831.36
  4. Step 4: Simplify right side
    520,431.68x = 208,914,543,250.19
  5. Step 5: Solve for x
    x = 208,914,543,250.19/520,431.68
  6. Step 6: Final answer
    x = 401,425.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.