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Finding the Fourth Proportional to 651.53, 978.65 and 554.01

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Solution

The fourth proportional to 651.53, 978.65 and 554.01 is: 832.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.53 : 978.65 = 554.01 : x
  2. Step 2: Convert to fraction form
    651.53/978.65 = 554.01/x
  3. Step 3: Cross multiply
    651.53x = 978.65 × 554.01
  4. Step 4: Simplify right side
    651.53x = 542,181.19
  5. Step 5: Solve for x
    x = 542,181.19/651.53
  6. Step 6: Final answer
    x = 832.17

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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.