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Finding the Fourth Proportional to 405,965.30, 608,947.95 and 125,510.90

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Solution

The fourth proportional to 405,965.30, 608,947.95 and 125,510.90 is: 188,266.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,965.30 : 608,947.95 = 125,510.90 : x
  2. Step 2: Convert to fraction form
    405,965.30/608,947.95 = 125,510.90/x
  3. Step 3: Cross multiply
    405,965.30x = 608,947.95 × 125,510.90
  4. Step 4: Simplify right side
    405,965.30x = 76,429,605,257.66
  5. Step 5: Solve for x
    x = 76,429,605,257.66/405,965.30
  6. Step 6: Final answer
    x = 188,266.35

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Double scale
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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.