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Finding the Fourth Proportional to 953.19, 1,430.37 and 405.36

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Solution

The fourth proportional to 953.19, 1,430.37 and 405.36 is: 608.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.19 : 1,430.37 = 405.36 : x
  2. Step 2: Convert to fraction form
    953.19/1,430.37 = 405.36/x
  3. Step 3: Cross multiply
    953.19x = 1,430.37 × 405.36
  4. Step 4: Simplify right side
    953.19x = 579,814.78
  5. Step 5: Solve for x
    x = 579,814.78/953.19
  6. Step 6: Final answer
    x = 608.29

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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.