Home / 650,899.75-972,391.39-421,325.20

Finding the Fourth Proportional to 650,899.75, 972,391.39 and 421,325.20

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Solution

The fourth proportional to 650,899.75, 972,391.39 and 421,325.20 is: 629,425.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    650,899.75 : 972,391.39 = 421,325.20 : x
  2. Step 2: Convert to fraction form
    650,899.75/972,391.39 = 421,325.20/x
  3. Step 3: Cross multiply
    650,899.75x = 972,391.39 × 421,325.20
  4. Step 4: Simplify right side
    650,899.75x = 409,692,989,901.45
  5. Step 5: Solve for x
    x = 409,692,989,901.45/650,899.75
  6. Step 6: Final answer
    x = 629,425.64

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.