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Finding the Fourth Proportional to 557.80, 835.80 and 525.40

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Solution

The fourth proportional to 557.80, 835.80 and 525.40 is: 787.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.80 : 835.80 = 525.40 : x
  2. Step 2: Convert to fraction form
    557.80/835.80 = 525.40/x
  3. Step 3: Cross multiply
    557.80x = 835.80 × 525.40
  4. Step 4: Simplify right side
    557.80x = 439,129.32
  5. Step 5: Solve for x
    x = 439,129.32/557.80
  6. Step 6: Final answer
    x = 787.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.