Home / 781,444.68-1,078,085.34-490,885.54

Finding the Fourth Proportional to 781,444.68, 1,078,085.34 and 490,885.54

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Solution

The fourth proportional to 781,444.68, 1,078,085.34 and 490,885.54 is: 677,228.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,444.68 : 1,078,085.34 = 490,885.54 : x
  2. Step 2: Convert to fraction form
    781,444.68/1,078,085.34 = 490,885.54/x
  3. Step 3: Cross multiply
    781,444.68x = 1,078,085.34 × 490,885.54
  4. Step 4: Simplify right side
    781,444.68x = 529,216,504,291.98
  5. Step 5: Solve for x
    x = 529,216,504,291.98/781,444.68
  6. Step 6: Final answer
    x = 677,228.37

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Half scale
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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.