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Finding the Fourth Proportional to 821,570.70, 1,232,485.65 and 260,661.90

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Solution

The fourth proportional to 821,570.70, 1,232,485.65 and 260,661.90 is: 391,033.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,570.70 : 1,232,485.65 = 260,661.90 : x
  2. Step 2: Convert to fraction form
    821,570.70/1,232,485.65 = 260,661.90/x
  3. Step 3: Cross multiply
    821,570.70x = 1,232,485.65 × 260,661.90
  4. Step 4: Simplify right side
    821,570.70x = 321,262,051,251.74
  5. Step 5: Solve for x
    x = 321,262,051,251.74/821,570.70
  6. Step 6: Final answer
    x = 391,033.97

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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.