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Finding the Fourth Proportional to 520.95, 777.80 and 469.11

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Solution

The fourth proportional to 520.95, 777.80 and 469.11 is: 700.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.95 : 777.80 = 469.11 : x
  2. Step 2: Convert to fraction form
    520.95/777.80 = 469.11/x
  3. Step 3: Cross multiply
    520.95x = 777.80 × 469.11
  4. Step 4: Simplify right side
    520.95x = 364,873.17
  5. Step 5: Solve for x
    x = 364,873.17/520.95
  6. Step 6: Final answer
    x = 700.40

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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.