Home / 1,420,520.80-2,130,781.20-578,639.20

Finding the Fourth Proportional to 1,420,520.80, 2,130,781.20 and 578,639.20

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Solution

The fourth proportional to 1,420,520.80, 2,130,781.20 and 578,639.20 is: 867,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420,520.80 : 2,130,781.20 = 578,639.20 : x
  2. Step 2: Convert to fraction form
    1,420,520.80/2,130,781.20 = 578,639.20/x
  3. Step 3: Cross multiply
    1,420,520.80x = 2,130,781.20 × 578,639.20
  4. Step 4: Simplify right side
    1,420,520.80x = 1,232,953,528,943.04
  5. Step 5: Solve for x
    x = 1,232,953,528,943.04/1,420,520.80
  6. Step 6: Final answer
    x = 867,958.80

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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.