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Finding the Fourth Proportional to 630,419.31, 870,003.05 and 358,512.03

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Solution

The fourth proportional to 630,419.31, 870,003.05 and 358,512.03 is: 494,760.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,419.31 : 870,003.05 = 358,512.03 : x
  2. Step 2: Convert to fraction form
    630,419.31/870,003.05 = 358,512.03/x
  3. Step 3: Cross multiply
    630,419.31x = 870,003.05 × 358,512.03
  4. Step 4: Simplify right side
    630,419.31x = 311,906,557,769.13
  5. Step 5: Solve for x
    x = 311,906,557,769.13/630,419.31
  6. Step 6: Final answer
    x = 494,760.48

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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.