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Finding the Fourth Proportional to 653.50, 981.62 and 498.89

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Solution

The fourth proportional to 653.50, 981.62 and 498.89 is: 749.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.50 : 981.62 = 498.89 : x
  2. Step 2: Convert to fraction form
    653.50/981.62 = 498.89/x
  3. Step 3: Cross multiply
    653.50x = 981.62 × 498.89
  4. Step 4: Simplify right side
    653.50x = 489,720.40
  5. Step 5: Solve for x
    x = 489,720.40/653.50
  6. Step 6: Final answer
    x = 749.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.