Home / 839,919.20-1,259,878.80-520,325.60

Finding the Fourth Proportional to 839,919.20, 1,259,878.80 and 520,325.60

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Solution

The fourth proportional to 839,919.20, 1,259,878.80 and 520,325.60 is: 780,488.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,919.20 : 1,259,878.80 = 520,325.60 : x
  2. Step 2: Convert to fraction form
    839,919.20/1,259,878.80 = 520,325.60/x
  3. Step 3: Cross multiply
    839,919.20x = 1,259,878.80 × 520,325.60
  4. Step 4: Simplify right side
    839,919.20x = 655,547,192,537.28
  5. Step 5: Solve for x
    x = 655,547,192,537.28/839,919.20
  6. Step 6: Final answer
    x = 780,488.40

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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.