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Finding the Fourth Proportional to 967.48, 1,451.08 and 390.40

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Solution

The fourth proportional to 967.48, 1,451.08 and 390.40 is: 585.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    967.48 : 1,451.08 = 390.40 : x
  2. Step 2: Convert to fraction form
    967.48/1,451.08 = 390.40/x
  3. Step 3: Cross multiply
    967.48x = 1,451.08 × 390.40
  4. Step 4: Simplify right side
    967.48x = 566,501.63
  5. Step 5: Solve for x
    x = 566,501.63/967.48
  6. Step 6: Final answer
    x = 585.54

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1.5x scale

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.