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Finding the Fourth Proportional to 730.90, 1,008.50 and 436.19

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Solution

The fourth proportional to 730.90, 1,008.50 and 436.19 is: 601.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.90 : 1,008.50 = 436.19 : x
  2. Step 2: Convert to fraction form
    730.90/1,008.50 = 436.19/x
  3. Step 3: Cross multiply
    730.90x = 1,008.50 × 436.19
  4. Step 4: Simplify right side
    730.90x = 439,901.23
  5. Step 5: Solve for x
    x = 439,901.23/730.90
  6. Step 6: Final answer
    x = 601.86

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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.