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Finding the Fourth Proportional to 615,616.81, 849,309.87 and 357,449.68

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Solution

The fourth proportional to 615,616.81, 849,309.87 and 357,449.68 is: 493,140.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,616.81 : 849,309.87 = 357,449.68 : x
  2. Step 2: Convert to fraction form
    615,616.81/849,309.87 = 357,449.68/x
  3. Step 3: Cross multiply
    615,616.81x = 849,309.87 × 357,449.68
  4. Step 4: Simplify right side
    615,616.81x = 303,585,541,252.34
  5. Step 5: Solve for x
    x = 303,585,541,252.34/615,616.81
  6. Step 6: Final answer
    x = 493,140.43

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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.