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Finding the Fourth Proportional to 830.42, 1,146.28 and 535.80

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Solution

The fourth proportional to 830.42, 1,146.28 and 535.80 is: 739.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.42 : 1,146.28 = 535.80 : x
  2. Step 2: Convert to fraction form
    830.42/1,146.28 = 535.80/x
  3. Step 3: Cross multiply
    830.42x = 1,146.28 × 535.80
  4. Step 4: Simplify right side
    830.42x = 614,176.82
  5. Step 5: Solve for x
    x = 614,176.82/830.42
  6. Step 6: Final answer
    x = 739.60

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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.