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Finding the Fourth Proportional to 309,660.40, 464,490.60 and 99,319.60

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Solution

The fourth proportional to 309,660.40, 464,490.60 and 99,319.60 is: 148,979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,660.40 : 464,490.60 = 99,319.60 : x
  2. Step 2: Convert to fraction form
    309,660.40/464,490.60 = 99,319.60/x
  3. Step 3: Cross multiply
    309,660.40x = 464,490.60 × 99,319.60
  4. Step 4: Simplify right side
    309,660.40x = 46,133,020,595.76
  5. Step 5: Solve for x
    x = 46,133,020,595.76/309,660.40
  6. Step 6: Final answer
    x = 148,979.40

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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.