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Finding the Fourth Proportional to 670.16, 924.55 and 408.15

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Solution

The fourth proportional to 670.16, 924.55 and 408.15 is: 563.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.16 : 924.55 = 408.15 : x
  2. Step 2: Convert to fraction form
    670.16/924.55 = 408.15/x
  3. Step 3: Cross multiply
    670.16x = 924.55 × 408.15
  4. Step 4: Simplify right side
    670.16x = 377,354.06
  5. Step 5: Solve for x
    x = 377,354.06/670.16
  6. Step 6: Final answer
    x = 563.08

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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.