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Finding the Fourth Proportional to 937.93, 1,406.34 and 390.49

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Solution

The fourth proportional to 937.93, 1,406.34 and 390.49 is: 585.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.93 : 1,406.34 = 390.49 : x
  2. Step 2: Convert to fraction form
    937.93/1,406.34 = 390.49/x
  3. Step 3: Cross multiply
    937.93x = 1,406.34 × 390.49
  4. Step 4: Simplify right side
    937.93x = 549,161.71
  5. Step 5: Solve for x
    x = 549,161.71/937.93
  6. Step 6: Final answer
    x = 585.50

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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.