Home / 1,355.31-2,030.81-1,307.79

Finding the Fourth Proportional to 1,355.31, 2,030.81 and 1,307.79

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Solution

The fourth proportional to 1,355.31, 2,030.81 and 1,307.79 is: 1,959.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.31 : 2,030.81 = 1,307.79 : x
  2. Step 2: Convert to fraction form
    1,355.31/2,030.81 = 1,307.79/x
  3. Step 3: Cross multiply
    1,355.31x = 2,030.81 × 1,307.79
  4. Step 4: Simplify right side
    1,355.31x = 2,655,866.47
  5. Step 5: Solve for x
    x = 2,655,866.47/1,355.31
  6. Step 6: Final answer
    x = 1,959.60

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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.