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Finding the Fourth Proportional to 305,372.40, 421,318.44 and 176,294.40

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Solution

The fourth proportional to 305,372.40, 421,318.44 and 176,294.40 is: 243,231.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,372.40 : 421,318.44 = 176,294.40 : x
  2. Step 2: Convert to fraction form
    305,372.40/421,318.44 = 176,294.40/x
  3. Step 3: Cross multiply
    305,372.40x = 421,318.44 × 176,294.40
  4. Step 4: Simplify right side
    305,372.40x = 74,276,081,588.74
  5. Step 5: Solve for x
    x = 74,276,081,588.74/305,372.40
  6. Step 6: Final answer
    x = 243,231.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.