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Finding the Fourth Proportional to 315,043.72, 472,423.42 and 90,352.57

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Solution

The fourth proportional to 315,043.72, 472,423.42 and 90,352.57 is: 135,488.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,043.72 : 472,423.42 = 90,352.57 : x
  2. Step 2: Convert to fraction form
    315,043.72/472,423.42 = 90,352.57/x
  3. Step 3: Cross multiply
    315,043.72x = 472,423.42 × 90,352.57
  4. Step 4: Simplify right side
    315,043.72x = 42,684,670,125.19
  5. Step 5: Solve for x
    x = 42,684,670,125.19/315,043.72
  6. Step 6: Final answer
    x = 135,488.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.