Home / 821,428.80-1,232,359.20-260,462.40

Finding the Fourth Proportional to 821,428.80, 1,232,359.20 and 260,462.40

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Solution

The fourth proportional to 821,428.80, 1,232,359.20 and 260,462.40 is: 390,762.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,428.80 : 1,232,359.20 = 260,462.40 : x
  2. Step 2: Convert to fraction form
    821,428.80/1,232,359.20 = 260,462.40/x
  3. Step 3: Cross multiply
    821,428.80x = 1,232,359.20 × 260,462.40
  4. Step 4: Simplify right side
    821,428.80x = 320,983,234,894.08
  5. Step 5: Solve for x
    x = 320,983,234,894.08/821,428.80
  6. Step 6: Final answer
    x = 390,762.09

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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.