Home / 1,688.79-2,330.57-942.72

Finding the Fourth Proportional to 1,688.79, 2,330.57 and 942.72

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Solution

The fourth proportional to 1,688.79, 2,330.57 and 942.72 is: 1,300.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.79 : 2,330.57 = 942.72 : x
  2. Step 2: Convert to fraction form
    1,688.79/2,330.57 = 942.72/x
  3. Step 3: Cross multiply
    1,688.79x = 2,330.57 × 942.72
  4. Step 4: Simplify right side
    1,688.79x = 2,197,070.24
  5. Step 5: Solve for x
    x = 2,197,070.24/1,688.79
  6. Step 6: Final answer
    x = 1,300.97

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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.