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Finding the Fourth Proportional to 570.61, 786.90 and 528.69

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Solution

The fourth proportional to 570.61, 786.90 and 528.69 is: 729.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.61 : 786.90 = 528.69 : x
  2. Step 2: Convert to fraction form
    570.61/786.90 = 528.69/x
  3. Step 3: Cross multiply
    570.61x = 786.90 × 528.69
  4. Step 4: Simplify right side
    570.61x = 416,026.16
  5. Step 5: Solve for x
    x = 416,026.16/570.61
  6. Step 6: Final answer
    x = 729.09

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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.