Home / 780,038.70-1,170,058.05-638,321.10

Finding the Fourth Proportional to 780,038.70, 1,170,058.05 and 638,321.10

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Solution

The fourth proportional to 780,038.70, 1,170,058.05 and 638,321.10 is: 957,481.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,038.70 : 1,170,058.05 = 638,321.10 : x
  2. Step 2: Convert to fraction form
    780,038.70/1,170,058.05 = 638,321.10/x
  3. Step 3: Cross multiply
    780,038.70x = 1,170,058.05 × 638,321.10
  4. Step 4: Simplify right side
    780,038.70x = 746,872,741,539.86
  5. Step 5: Solve for x
    x = 746,872,741,539.86/780,038.70
  6. Step 6: Final answer
    x = 957,481.65

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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.