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Finding the Fourth Proportional to 630, 869.40 and 446.32

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Solution

The fourth proportional to 630, 869.40 and 446.32 is: 615.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    630 : 869.40 = 446.32 : x
  2. Step 2: Convert to fraction form
    630/869.40 = 446.32/x
  3. Step 3: Cross multiply
    630x = 869.40 × 446.32
  4. Step 4: Simplify right side
    630x = 388,030.61
  5. Step 5: Solve for x
    x = 388,030.61/630
  6. Step 6: Final answer
    x = 615.92

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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.