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Finding the Fourth Proportional to 528.02, 786.87 and 510.61

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Solution

The fourth proportional to 528.02, 786.87 and 510.61 is: 760.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.02 : 786.87 = 510.61 : x
  2. Step 2: Convert to fraction form
    528.02/786.87 = 510.61/x
  3. Step 3: Cross multiply
    528.02x = 786.87 × 510.61
  4. Step 4: Simplify right side
    528.02x = 401,777.20
  5. Step 5: Solve for x
    x = 401,777.20/528.02
  6. Step 6: Final answer
    x = 760.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.