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Finding the Fourth Proportional to 687.01, 947.32 and 500.58

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Solution

The fourth proportional to 687.01, 947.32 and 500.58 is: 690.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.01 : 947.32 = 500.58 : x
  2. Step 2: Convert to fraction form
    687.01/947.32 = 500.58/x
  3. Step 3: Cross multiply
    687.01x = 947.32 × 500.58
  4. Step 4: Simplify right side
    687.01x = 474,209.60
  5. Step 5: Solve for x
    x = 474,209.60/687.01
  6. Step 6: Final answer
    x = 690.25

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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.