Home / 780,031.70-1,170,047.55-638,314.10

Finding the Fourth Proportional to 780,031.70, 1,170,047.55 and 638,314.10

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Solution

The fourth proportional to 780,031.70, 1,170,047.55 and 638,314.10 is: 957,471.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,031.70 : 1,170,047.55 = 638,314.10 : x
  2. Step 2: Convert to fraction form
    780,031.70/1,170,047.55 = 638,314.10/x
  3. Step 3: Cross multiply
    780,031.70x = 1,170,047.55 × 638,314.10
  4. Step 4: Simplify right side
    780,031.70x = 746,857,848,835.46
  5. Step 5: Solve for x
    x = 746,857,848,835.46/780,031.70
  6. Step 6: Final answer
    x = 957,471.15

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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.