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Finding the Fourth Proportional to 282,812.13, 390,281.72 and 155,495.79

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Solution

The fourth proportional to 282,812.13, 390,281.72 and 155,495.79 is: 214,584.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,812.13 : 390,281.72 = 155,495.79 : x
  2. Step 2: Convert to fraction form
    282,812.13/390,281.72 = 155,495.79/x
  3. Step 3: Cross multiply
    282,812.13x = 390,281.72 × 155,495.79
  4. Step 4: Simplify right side
    282,812.13x = 60,687,163,596.48
  5. Step 5: Solve for x
    x = 60,687,163,596.48/282,812.13
  6. Step 6: Final answer
    x = 214,584.73

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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.