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Finding the Fourth Proportional to 695.08, 953.05 and 678.68

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Solution

The fourth proportional to 695.08, 953.05 and 678.68 is: 930.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.08 : 953.05 = 678.68 : x
  2. Step 2: Convert to fraction form
    695.08/953.05 = 678.68/x
  3. Step 3: Cross multiply
    695.08x = 953.05 × 678.68
  4. Step 4: Simplify right side
    695.08x = 646,807.82
  5. Step 5: Solve for x
    x = 646,807.82/695.08
  6. Step 6: Final answer
    x = 930.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.