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Finding the Fourth Proportional to 315,007.80, 472,511.70 and 149,119.80

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Solution

The fourth proportional to 315,007.80, 472,511.70 and 149,119.80 is: 223,679.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,007.80 : 472,511.70 = 149,119.80 : x
  2. Step 2: Convert to fraction form
    315,007.80/472,511.70 = 149,119.80/x
  3. Step 3: Cross multiply
    315,007.80x = 472,511.70 × 149,119.80
  4. Step 4: Simplify right side
    315,007.80x = 70,460,850,201.66
  5. Step 5: Solve for x
    x = 70,460,850,201.66/315,007.80
  6. Step 6: Final answer
    x = 223,679.70

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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.