Home / 890,439.40-1,335,788.70-291,255.40

Finding the Fourth Proportional to 890,439.40, 1,335,788.70 and 291,255.40

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Solution

The fourth proportional to 890,439.40, 1,335,788.70 and 291,255.40 is: 436,925.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,439.40 : 1,335,788.70 = 291,255.40 : x
  2. Step 2: Convert to fraction form
    890,439.40/1,335,788.70 = 291,255.40/x
  3. Step 3: Cross multiply
    890,439.40x = 1,335,788.70 × 291,255.40
  4. Step 4: Simplify right side
    890,439.40x = 389,055,672,133.98
  5. Step 5: Solve for x
    x = 389,055,672,133.98/890,439.40
  6. Step 6: Final answer
    x = 436,925.49

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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.