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Finding the Fourth Proportional to 358,640.68, 494,925.54 and 215,403.16

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Solution

The fourth proportional to 358,640.68, 494,925.54 and 215,403.16 is: 297,257.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,640.68 : 494,925.54 = 215,403.16 : x
  2. Step 2: Convert to fraction form
    358,640.68/494,925.54 = 215,403.16/x
  3. Step 3: Cross multiply
    358,640.68x = 494,925.54 × 215,403.16
  4. Step 4: Simplify right side
    358,640.68x = 106,608,525,280.71
  5. Step 5: Solve for x
    x = 106,608,525,280.71/358,640.68
  6. Step 6: Final answer
    x = 297,257.20

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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.