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Finding the Fourth Proportional to 1,663.52, 2,495.27 and 430.95

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Solution

The fourth proportional to 1,663.52, 2,495.27 and 430.95 is: 646.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,663.52 : 2,495.27 = 430.95 : x
  2. Step 2: Convert to fraction form
    1,663.52/2,495.27 = 430.95/x
  3. Step 3: Cross multiply
    1,663.52x = 2,495.27 × 430.95
  4. Step 4: Simplify right side
    1,663.52x = 1,075,324.17
  5. Step 5: Solve for x
    x = 1,075,324.17/1,663.52
  6. Step 6: Final answer
    x = 646.41

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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.