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Finding the Fourth Proportional to 1,070.47, 1,605.57 and 290.53

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Solution

The fourth proportional to 1,070.47, 1,605.57 and 290.53 is: 435.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.47 : 1,605.57 = 290.53 : x
  2. Step 2: Convert to fraction form
    1,070.47/1,605.57 = 290.53/x
  3. Step 3: Cross multiply
    1,070.47x = 1,605.57 × 290.53
  4. Step 4: Simplify right side
    1,070.47x = 466,466.25
  5. Step 5: Solve for x
    x = 466,466.25/1,070.47
  6. Step 6: Final answer
    x = 435.76

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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.