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Finding the Fourth Proportional to 929.65, 1,283.58 and 681.34

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Solution

The fourth proportional to 929.65, 1,283.58 and 681.34 is: 940.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.65 : 1,283.58 = 681.34 : x
  2. Step 2: Convert to fraction form
    929.65/1,283.58 = 681.34/x
  3. Step 3: Cross multiply
    929.65x = 1,283.58 × 681.34
  4. Step 4: Simplify right side
    929.65x = 874,554.40
  5. Step 5: Solve for x
    x = 874,554.40/929.65
  6. Step 6: Final answer
    x = 940.74

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1.5x scale

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.