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Finding the Fourth Proportional to 315,064.15, 472,454.07 and 90,373.60

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Solution

The fourth proportional to 315,064.15, 472,454.07 and 90,373.60 is: 135,519.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,064.15 : 472,454.07 = 90,373.60 : x
  2. Step 2: Convert to fraction form
    315,064.15/472,454.07 = 90,373.60/x
  3. Step 3: Cross multiply
    315,064.15x = 472,454.07 × 90,373.60
  4. Step 4: Simplify right side
    315,064.15x = 42,697,375,140.55
  5. Step 5: Solve for x
    x = 42,697,375,140.55/315,064.15
  6. Step 6: Final answer
    x = 135,519.62

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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.