Home / 1,558.31-2,339.28-909.50

Finding the Fourth Proportional to 1,558.31, 2,339.28 and 909.50

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Solution

The fourth proportional to 1,558.31, 2,339.28 and 909.50 is: 1,365.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.31 : 2,339.28 = 909.50 : x
  2. Step 2: Convert to fraction form
    1,558.31/2,339.28 = 909.50/x
  3. Step 3: Cross multiply
    1,558.31x = 2,339.28 × 909.50
  4. Step 4: Simplify right side
    1,558.31x = 2,127,563.46
  5. Step 5: Solve for x
    x = 2,127,563.46/1,558.31
  6. Step 6: Final answer
    x = 1,365.31

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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.