Home / 771,441.39-1,157,345.55-321,912.45

Finding the Fourth Proportional to 771,441.39, 1,157,345.55 and 321,912.45

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Solution

The fourth proportional to 771,441.39, 1,157,345.55 and 321,912.45 is: 482,945.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    771,441.39 : 1,157,345.55 = 321,912.45 : x
  2. Step 2: Convert to fraction form
    771,441.39/1,157,345.55 = 321,912.45/x
  3. Step 3: Cross multiply
    771,441.39x = 1,157,345.55 × 321,912.45
  4. Step 4: Simplify right side
    771,441.39x = 372,563,941,497.10
  5. Step 5: Solve for x
    x = 372,563,941,497.10/771,441.39
  6. Step 6: Final answer
    x = 482,945.23

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Double scale
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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.