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Finding the Fourth Proportional to 890,659.13, 1,229,187.35 and 488,328.89

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Solution

The fourth proportional to 890,659.13, 1,229,187.35 and 488,328.89 is: 673,936.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,659.13 : 1,229,187.35 = 488,328.89 : x
  2. Step 2: Convert to fraction form
    890,659.13/1,229,187.35 = 488,328.89/x
  3. Step 3: Cross multiply
    890,659.13x = 1,229,187.35 × 488,328.89
  4. Step 4: Simplify right side
    890,659.13x = 600,247,689,302.43
  5. Step 5: Solve for x
    x = 600,247,689,302.43/890,659.13
  6. Step 6: Final answer
    x = 673,936.50

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.