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Finding the Fourth Proportional to 687.33, 947.61 and 510.30

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Solution

The fourth proportional to 687.33, 947.61 and 510.30 is: 703.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.33 : 947.61 = 510.30 : x
  2. Step 2: Convert to fraction form
    687.33/947.61 = 510.30/x
  3. Step 3: Cross multiply
    687.33x = 947.61 × 510.30
  4. Step 4: Simplify right side
    687.33x = 483,565.38
  5. Step 5: Solve for x
    x = 483,565.38/687.33
  6. Step 6: Final answer
    x = 703.54

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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.