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Finding the Fourth Proportional to 669.18, 923.64 and 436.26

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Solution

The fourth proportional to 669.18, 923.64 and 436.26 is: 602.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.18 : 923.64 = 436.26 : x
  2. Step 2: Convert to fraction form
    669.18/923.64 = 436.26/x
  3. Step 3: Cross multiply
    669.18x = 923.64 × 436.26
  4. Step 4: Simplify right side
    669.18x = 402,947.19
  5. Step 5: Solve for x
    x = 402,947.19/669.18
  6. Step 6: Final answer
    x = 602.15

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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.