Home / 858,812.40-1,288,218.60-543,625.20

Finding the Fourth Proportional to 858,812.40, 1,288,218.60 and 543,625.20

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Solution

The fourth proportional to 858,812.40, 1,288,218.60 and 543,625.20 is: 815,437.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,812.40 : 1,288,218.60 = 543,625.20 : x
  2. Step 2: Convert to fraction form
    858,812.40/1,288,218.60 = 543,625.20/x
  3. Step 3: Cross multiply
    858,812.40x = 1,288,218.60 × 543,625.20
  4. Step 4: Simplify right side
    858,812.40x = 700,308,094,068.72
  5. Step 5: Solve for x
    x = 700,308,094,068.72/858,812.40
  6. Step 6: Final answer
    x = 815,437.80

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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.