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Finding the Fourth Proportional to 315,063.15, 472,452.57 and 90,372.60

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Solution

The fourth proportional to 315,063.15, 472,452.57 and 90,372.60 is: 135,518.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,063.15 : 472,452.57 = 90,372.60 : x
  2. Step 2: Convert to fraction form
    315,063.15/472,452.57 = 90,372.60/x
  3. Step 3: Cross multiply
    315,063.15x = 472,452.57 × 90,372.60
  4. Step 4: Simplify right side
    315,063.15x = 42,696,767,127.58
  5. Step 5: Solve for x
    x = 42,696,767,127.58/315,063.15
  6. Step 6: Final answer
    x = 135,518.12

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1.5x scale

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.