Home / 645,995.11-891,464.55-359,515.12

Finding the Fourth Proportional to 645,995.11, 891,464.55 and 359,515.12

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Solution

The fourth proportional to 645,995.11, 891,464.55 and 359,515.12 is: 496,126.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,995.11 : 891,464.55 = 359,515.12 : x
  2. Step 2: Convert to fraction form
    645,995.11/891,464.55 = 359,515.12/x
  3. Step 3: Cross multiply
    645,995.11x = 891,464.55 × 359,515.12
  4. Step 4: Simplify right side
    645,995.11x = 320,494,984,669.00
  5. Step 5: Solve for x
    x = 320,494,984,669.00/645,995.11
  6. Step 6: Final answer
    x = 496,126.02

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.