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Finding the Fourth Proportional to 1,036.94, 1,430.60 and 663.42

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Solution

The fourth proportional to 1,036.94, 1,430.60 and 663.42 is: 915.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.94 : 1,430.60 = 663.42 : x
  2. Step 2: Convert to fraction form
    1,036.94/1,430.60 = 663.42/x
  3. Step 3: Cross multiply
    1,036.94x = 1,430.60 × 663.42
  4. Step 4: Simplify right side
    1,036.94x = 949,088.65
  5. Step 5: Solve for x
    x = 949,088.65/1,036.94
  6. Step 6: Final answer
    x = 915.28

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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.