Home / 1,086.02-1,628.80-355.40

Finding the Fourth Proportional to 1,086.02, 1,628.80 and 355.40

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Solution

The fourth proportional to 1,086.02, 1,628.80 and 355.40 is: 533.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.02 : 1,628.80 = 355.40 : x
  2. Step 2: Convert to fraction form
    1,086.02/1,628.80 = 355.40/x
  3. Step 3: Cross multiply
    1,086.02x = 1,628.80 × 355.40
  4. Step 4: Simplify right side
    1,086.02x = 578,875.52
  5. Step 5: Solve for x
    x = 578,875.52/1,086.02
  6. Step 6: Final answer
    x = 533.02

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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.