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Finding the Fourth Proportional to 312,603.90, 468,905.85 and 146,715.90

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Solution

The fourth proportional to 312,603.90, 468,905.85 and 146,715.90 is: 220,073.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,603.90 : 468,905.85 = 146,715.90 : x
  2. Step 2: Convert to fraction form
    312,603.90/468,905.85 = 146,715.90/x
  3. Step 3: Cross multiply
    312,603.90x = 468,905.85 × 146,715.90
  4. Step 4: Simplify right side
    312,603.90x = 68,795,943,798.02
  5. Step 5: Solve for x
    x = 68,795,943,798.02/312,603.90
  6. Step 6: Final answer
    x = 220,073.85

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Similar ratio
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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.