Home / 1,688.40-2,330.01-942.35

Finding the Fourth Proportional to 1,688.40, 2,330.01 and 942.35

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Solution

The fourth proportional to 1,688.40, 2,330.01 and 942.35 is: 1,300.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.40 : 2,330.01 = 942.35 : x
  2. Step 2: Convert to fraction form
    1,688.40/2,330.01 = 942.35/x
  3. Step 3: Cross multiply
    1,688.40x = 2,330.01 × 942.35
  4. Step 4: Simplify right side
    1,688.40x = 2,195,673.27
  5. Step 5: Solve for x
    x = 2,195,673.27/1,688.40
  6. Step 6: Final answer
    x = 1,300.45

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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.