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Finding the Fourth Proportional to 998,339.80, 1,497,509.70 and 620,426.20

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Solution

The fourth proportional to 998,339.80, 1,497,509.70 and 620,426.20 is: 930,639.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    998,339.80 : 1,497,509.70 = 620,426.20 : x
  2. Step 2: Convert to fraction form
    998,339.80/1,497,509.70 = 620,426.20/x
  3. Step 3: Cross multiply
    998,339.80x = 1,497,509.70 × 620,426.20
  4. Step 4: Simplify right side
    998,339.80x = 929,094,252,634.14
  5. Step 5: Solve for x
    x = 929,094,252,634.14/998,339.80
  6. Step 6: Final answer
    x = 930,639.30

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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.