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Finding the Fourth Proportional to 730.86, 1,008.20 and 436.08

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Solution

The fourth proportional to 730.86, 1,008.20 and 436.08 is: 601.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.86 : 1,008.20 = 436.08 : x
  2. Step 2: Convert to fraction form
    730.86/1,008.20 = 436.08/x
  3. Step 3: Cross multiply
    730.86x = 1,008.20 × 436.08
  4. Step 4: Simplify right side
    730.86x = 439,655.86
  5. Step 5: Solve for x
    x = 439,655.86/730.86
  6. Step 6: Final answer
    x = 601.56

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1.5x scale

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.