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Finding the Fourth Proportional to 490,098.80, 687,538 and 490,098.80

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Solution

The fourth proportional to 490,098.80, 687,538 and 490,098.80 is: 687,538.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,098.80 : 687,538 = 490,098.80 : x
  2. Step 2: Convert to fraction form
    490,098.80/687,538 = 490,098.80/x
  3. Step 3: Cross multiply
    490,098.80x = 687,538 × 490,098.80
  4. Step 4: Simplify right side
    490,098.80x = 336,961,548,754.40
  5. Step 5: Solve for x
    x = 336,961,548,754.40/490,098.80
  6. Step 6: Final answer
    x = 687,538.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.