Home / 821,421.60-1,232,017.20-260,512.80

Finding the Fourth Proportional to 821,421.60, 1,232,017.20 and 260,512.80

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Solution

The fourth proportional to 821,421.60, 1,232,017.20 and 260,512.80 is: 390,732.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,421.60 : 1,232,017.20 = 260,512.80 : x
  2. Step 2: Convert to fraction form
    821,421.60/1,232,017.20 = 260,512.80/x
  3. Step 3: Cross multiply
    821,421.60x = 1,232,017.20 × 260,512.80
  4. Step 4: Simplify right side
    821,421.60x = 320,956,250,420.16
  5. Step 5: Solve for x
    x = 320,956,250,420.16/821,421.60
  6. Step 6: Final answer
    x = 390,732.66

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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.