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Finding the Fourth Proportional to 282,930.71, 390,446.99 and 153,870.43

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Solution

The fourth proportional to 282,930.71, 390,446.99 and 153,870.43 is: 212,342.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,930.71 : 390,446.99 = 153,870.43 : x
  2. Step 2: Convert to fraction form
    282,930.71/390,446.99 = 153,870.43/x
  3. Step 3: Cross multiply
    282,930.71x = 390,446.99 × 153,870.43
  4. Step 4: Simplify right side
    282,930.71x = 60,078,245,640.80
  5. Step 5: Solve for x
    x = 60,078,245,640.80/282,930.71
  6. Step 6: Final answer
    x = 212,342.61

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1.5x scale

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.