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Finding the Fourth Proportional to 282,335.60, 389,623.79 and 155,019.40

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Solution

The fourth proportional to 282,335.60, 389,623.79 and 155,019.40 is: 213,927.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,335.60 : 389,623.79 = 155,019.40 : x
  2. Step 2: Convert to fraction form
    282,335.60/389,623.79 = 155,019.40/x
  3. Step 3: Cross multiply
    282,335.60x = 389,623.79 × 155,019.40
  4. Step 4: Simplify right side
    282,335.60x = 60,399,246,151.53
  5. Step 5: Solve for x
    x = 60,399,246,151.53/282,335.60
  6. Step 6: Final answer
    x = 213,927.14

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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.