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Finding the Fourth Proportional to 635,038.72, 876,022.39 and 390,078.69

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Solution

The fourth proportional to 635,038.72, 876,022.39 and 390,078.69 is: 538,105.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    635,038.72 : 876,022.39 = 390,078.69 : x
  2. Step 2: Convert to fraction form
    635,038.72/876,022.39 = 390,078.69/x
  3. Step 3: Cross multiply
    635,038.72x = 876,022.39 × 390,078.69
  4. Step 4: Simplify right side
    635,038.72x = 341,717,663,504.38
  5. Step 5: Solve for x
    x = 341,717,663,504.38/635,038.72
  6. Step 6: Final answer
    x = 538,105.24

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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.