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Finding the Fourth Proportional to 651.07, 975.93 and 390.43

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Solution

The fourth proportional to 651.07, 975.93 and 390.43 is: 585.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.07 : 975.93 = 390.43 : x
  2. Step 2: Convert to fraction form
    651.07/975.93 = 390.43/x
  3. Step 3: Cross multiply
    651.07x = 975.93 × 390.43
  4. Step 4: Simplify right side
    651.07x = 381,032.35
  5. Step 5: Solve for x
    x = 381,032.35/651.07
  6. Step 6: Final answer
    x = 585.24

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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.