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Finding the Fourth Proportional to 684.40, 1,026.60 and 602.32

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Solution

The fourth proportional to 684.40, 1,026.60 and 602.32 is: 903.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.40 : 1,026.60 = 602.32 : x
  2. Step 2: Convert to fraction form
    684.40/1,026.60 = 602.32/x
  3. Step 3: Cross multiply
    684.40x = 1,026.60 × 602.32
  4. Step 4: Simplify right side
    684.40x = 618,341.71
  5. Step 5: Solve for x
    x = 618,341.71/684.40
  6. Step 6: Final answer
    x = 903.48

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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.