Home / 821,346.60-1,231,904.70-260,437.80

Finding the Fourth Proportional to 821,346.60, 1,231,904.70 and 260,437.80

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Solution

The fourth proportional to 821,346.60, 1,231,904.70 and 260,437.80 is: 390,620.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,346.60 : 1,231,904.70 = 260,437.80 : x
  2. Step 2: Convert to fraction form
    821,346.60/1,231,904.70 = 260,437.80/x
  3. Step 3: Cross multiply
    821,346.60x = 1,231,904.70 × 260,437.80
  4. Step 4: Simplify right side
    821,346.60x = 320,834,549,877.66
  5. Step 5: Solve for x
    x = 320,834,549,877.66/821,346.60
  6. Step 6: Final answer
    x = 390,620.17

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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.