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Finding the Fourth Proportional to 390,718.74, 586,055.43 and 150,785.71

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Solution

The fourth proportional to 390,718.74, 586,055.43 and 150,785.71 is: 226,169.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,718.74 : 586,055.43 = 150,785.71 : x
  2. Step 2: Convert to fraction form
    390,718.74/586,055.43 = 150,785.71/x
  3. Step 3: Cross multiply
    390,718.74x = 586,055.43 × 150,785.71
  4. Step 4: Simplify right side
    390,718.74x = 88,368,782,646.77
  5. Step 5: Solve for x
    x = 88,368,782,646.77/390,718.74
  6. Step 6: Final answer
    x = 226,169.81

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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.