Home / 821,639.80-1,232,459.70-260,674.30

Finding the Fourth Proportional to 821,639.80, 1,232,459.70 and 260,674.30

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Solution

The fourth proportional to 821,639.80, 1,232,459.70 and 260,674.30 is: 391,011.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,639.80 : 1,232,459.70 = 260,674.30 : x
  2. Step 2: Convert to fraction form
    821,639.80/1,232,459.70 = 260,674.30/x
  3. Step 3: Cross multiply
    821,639.80x = 1,232,459.70 × 260,674.30
  4. Step 4: Simplify right side
    821,639.80x = 321,270,569,575.71
  5. Step 5: Solve for x
    x = 321,270,569,575.71/821,639.80
  6. Step 6: Final answer
    x = 391,011.45

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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.