Home / 1,571.18-2,356.70-646.50

Finding the Fourth Proportional to 1,571.18, 2,356.70 and 646.50

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Solution

The fourth proportional to 1,571.18, 2,356.70 and 646.50 is: 969.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.18 : 2,356.70 = 646.50 : x
  2. Step 2: Convert to fraction form
    1,571.18/2,356.70 = 646.50/x
  3. Step 3: Cross multiply
    1,571.18x = 2,356.70 × 646.50
  4. Step 4: Simplify right side
    1,571.18x = 1,523,606.55
  5. Step 5: Solve for x
    x = 1,523,606.55/1,571.18
  6. Step 6: Final answer
    x = 969.72

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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.