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Finding the Fourth Proportional to 1,036.02, 1,430.28 and 663.24

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Solution

The fourth proportional to 1,036.02, 1,430.28 and 663.24 is: 915.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.02 : 1,430.28 = 663.24 : x
  2. Step 2: Convert to fraction form
    1,036.02/1,430.28 = 663.24/x
  3. Step 3: Cross multiply
    1,036.02x = 1,430.28 × 663.24
  4. Step 4: Simplify right side
    1,036.02x = 948,618.91
  5. Step 5: Solve for x
    x = 948,618.91/1,036.02
  6. Step 6: Final answer
    x = 915.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.