Home / 1,688.18-2,329.54-942.13

Finding the Fourth Proportional to 1,688.18, 2,329.54 and 942.13

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Solution

The fourth proportional to 1,688.18, 2,329.54 and 942.13 is: 1,300.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.18 : 2,329.54 = 942.13 : x
  2. Step 2: Convert to fraction form
    1,688.18/2,329.54 = 942.13/x
  3. Step 3: Cross multiply
    1,688.18x = 2,329.54 × 942.13
  4. Step 4: Simplify right side
    1,688.18x = 2,194,729.52
  5. Step 5: Solve for x
    x = 2,194,729.52/1,688.18
  6. Step 6: Final answer
    x = 1,300.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.