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Finding the Fourth Proportional to 1,205.04, 1,806.48 and 435

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Solution

The fourth proportional to 1,205.04, 1,806.48 and 435 is: 652.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205.04 : 1,806.48 = 435 : x
  2. Step 2: Convert to fraction form
    1,205.04/1,806.48 = 435/x
  3. Step 3: Cross multiply
    1,205.04x = 1,806.48 × 435
  4. Step 4: Simplify right side
    1,205.04x = 785,818.80
  5. Step 5: Solve for x
    x = 785,818.80/1,205.04
  6. Step 6: Final answer
    x = 652.11

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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.