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Finding the Fourth Proportional to 282,700.81, 390,134.55 and 155,379.79

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Solution

The fourth proportional to 282,700.81, 390,134.55 and 155,379.79 is: 214,428.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,700.81 : 390,134.55 = 155,379.79 : x
  2. Step 2: Convert to fraction form
    282,700.81/390,134.55 = 155,379.79/x
  3. Step 3: Cross multiply
    282,700.81x = 390,134.55 × 155,379.79
  4. Step 4: Simplify right side
    282,700.81x = 60,619,024,450.74
  5. Step 5: Solve for x
    x = 60,619,024,450.74/282,700.81
  6. Step 6: Final answer
    x = 214,428.20

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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.