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Finding the Fourth Proportional to 945.32, 1,303.90 and 571.66

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Solution

The fourth proportional to 945.32, 1,303.90 and 571.66 is: 788.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.32 : 1,303.90 = 571.66 : x
  2. Step 2: Convert to fraction form
    945.32/1,303.90 = 571.66/x
  3. Step 3: Cross multiply
    945.32x = 1,303.90 × 571.66
  4. Step 4: Simplify right side
    945.32x = 745,382.79
  5. Step 5: Solve for x
    x = 745,382.79/945.32
  6. Step 6: Final answer
    x = 788.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.