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Finding the Fourth Proportional to 525.70, 783.91 and 521.01

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Solution

The fourth proportional to 525.70, 783.91 and 521.01 is: 776.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.70 : 783.91 = 521.01 : x
  2. Step 2: Convert to fraction form
    525.70/783.91 = 521.01/x
  3. Step 3: Cross multiply
    525.70x = 783.91 × 521.01
  4. Step 4: Simplify right side
    525.70x = 408,424.95
  5. Step 5: Solve for x
    x = 408,424.95/525.70
  6. Step 6: Final answer
    x = 776.92

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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.