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Finding the Fourth Proportional to 957.08, 1,320.90 and 695.36

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Solution

The fourth proportional to 957.08, 1,320.90 and 695.36 is: 959.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.08 : 1,320.90 = 695.36 : x
  2. Step 2: Convert to fraction form
    957.08/1,320.90 = 695.36/x
  3. Step 3: Cross multiply
    957.08x = 1,320.90 × 695.36
  4. Step 4: Simplify right side
    957.08x = 918,501.02
  5. Step 5: Solve for x
    x = 918,501.02/957.08
  6. Step 6: Final answer
    x = 959.69

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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.