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Finding the Fourth Proportional to 830.73, 1,146.54 and 499.35

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Solution

The fourth proportional to 830.73, 1,146.54 and 499.35 is: 689.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.73 : 1,146.54 = 499.35 : x
  2. Step 2: Convert to fraction form
    830.73/1,146.54 = 499.35/x
  3. Step 3: Cross multiply
    830.73x = 1,146.54 × 499.35
  4. Step 4: Simplify right side
    830.73x = 572,524.75
  5. Step 5: Solve for x
    x = 572,524.75/830.73
  6. Step 6: Final answer
    x = 689.18

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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.