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Finding the Fourth Proportional to 611.60, 918.84 and 503.60

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Solution

The fourth proportional to 611.60, 918.84 and 503.60 is: 756.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.60 : 918.84 = 503.60 : x
  2. Step 2: Convert to fraction form
    611.60/918.84 = 503.60/x
  3. Step 3: Cross multiply
    611.60x = 918.84 × 503.60
  4. Step 4: Simplify right side
    611.60x = 462,727.82
  5. Step 5: Solve for x
    x = 462,727.82/611.60
  6. Step 6: Final answer
    x = 756.59

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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.