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Finding the Fourth Proportional to 448,886.90, 619,278.05 and 313,001.30

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Solution

The fourth proportional to 448,886.90, 619,278.05 and 313,001.30 is: 431,812.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,886.90 : 619,278.05 = 313,001.30 : x
  2. Step 2: Convert to fraction form
    448,886.90/619,278.05 = 313,001.30/x
  3. Step 3: Cross multiply
    448,886.90x = 619,278.05 × 313,001.30
  4. Step 4: Simplify right side
    448,886.90x = 193,834,832,397.58
  5. Step 5: Solve for x
    x = 193,834,832,397.58/448,886.90
  6. Step 6: Final answer
    x = 431,812.19

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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.