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Finding the Fourth Proportional to 930.58, 1,284.20 and 510.94

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Solution

The fourth proportional to 930.58, 1,284.20 and 510.94 is: 705.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.58 : 1,284.20 = 510.94 : x
  2. Step 2: Convert to fraction form
    930.58/1,284.20 = 510.94/x
  3. Step 3: Cross multiply
    930.58x = 1,284.20 × 510.94
  4. Step 4: Simplify right side
    930.58x = 656,149.15
  5. Step 5: Solve for x
    x = 656,149.15/930.58
  6. Step 6: Final answer
    x = 705.10

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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.