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Finding the Fourth Proportional to 953.03, 1,428.75 and 405.60

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Solution

The fourth proportional to 953.03, 1,428.75 and 405.60 is: 608.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.03 : 1,428.75 = 405.60 : x
  2. Step 2: Convert to fraction form
    953.03/1,428.75 = 405.60/x
  3. Step 3: Cross multiply
    953.03x = 1,428.75 × 405.60
  4. Step 4: Simplify right side
    953.03x = 579,501
  5. Step 5: Solve for x
    x = 579,501/953.03
  6. Step 6: Final answer
    x = 608.06

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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.