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Finding the Fourth Proportional to 282,957.18, 390,481.11 and 155,642.46

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Solution

The fourth proportional to 282,957.18, 390,481.11 and 155,642.46 is: 214,786.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,957.18 : 390,481.11 = 155,642.46 : x
  2. Step 2: Convert to fraction form
    282,957.18/390,481.11 = 155,642.46/x
  3. Step 3: Cross multiply
    282,957.18x = 390,481.11 × 155,642.46
  4. Step 4: Simplify right side
    282,957.18x = 60,775,440,543.93
  5. Step 5: Solve for x
    x = 60,775,440,543.93/282,957.18
  6. Step 6: Final answer
    x = 214,786.71

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.