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Finding the Fourth Proportional to 615,672, 849,768.80 and 361,105.20

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Solution

The fourth proportional to 615,672, 849,768.80 and 361,105.20 is: 498,408.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,672 : 849,768.80 = 361,105.20 : x
  2. Step 2: Convert to fraction form
    615,672/849,768.80 = 361,105.20/x
  3. Step 3: Cross multiply
    615,672x = 849,768.80 × 361,105.20
  4. Step 4: Simplify right side
    615,672x = 306,855,932,477.76
  5. Step 5: Solve for x
    x = 306,855,932,477.76/615,672
  6. Step 6: Final answer
    x = 498,408.13

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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.