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Finding the Fourth Proportional to 615,698.61, 849,805.80 and 361,131.81

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Solution

The fourth proportional to 615,698.61, 849,805.80 and 361,131.81 is: 498,445.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,698.61 : 849,805.80 = 361,131.81 : x
  2. Step 2: Convert to fraction form
    615,698.61/849,805.80 = 361,131.81/x
  3. Step 3: Cross multiply
    615,698.61x = 849,805.80 × 361,131.81
  4. Step 4: Simplify right side
    615,698.61x = 306,891,900,647.81
  5. Step 5: Solve for x
    x = 306,891,900,647.81/615,698.61
  6. Step 6: Final answer
    x = 498,445.02

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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.