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Finding the Fourth Proportional to 390,379.28, 538,515.68 and 237,464.24

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Solution

The fourth proportional to 390,379.28, 538,515.68 and 237,464.24 is: 327,574.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,379.28 : 538,515.68 = 237,464.24 : x
  2. Step 2: Convert to fraction form
    390,379.28/538,515.68 = 237,464.24/x
  3. Step 3: Cross multiply
    390,379.28x = 538,515.68 × 237,464.24
  4. Step 4: Simplify right side
    390,379.28x = 127,878,212,799.38
  5. Step 5: Solve for x
    x = 127,878,212,799.38/390,379.28
  6. Step 6: Final answer
    x = 327,574.29

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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.