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Finding the Fourth Proportional to 322,454.10, 483,681.15 and 85,820.70

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Solution

The fourth proportional to 322,454.10, 483,681.15 and 85,820.70 is: 128,731.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,454.10 : 483,681.15 = 85,820.70 : x
  2. Step 2: Convert to fraction form
    322,454.10/483,681.15 = 85,820.70/x
  3. Step 3: Cross multiply
    322,454.10x = 483,681.15 × 85,820.70
  4. Step 4: Simplify right side
    322,454.10x = 41,509,854,869.81
  5. Step 5: Solve for x
    x = 41,509,854,869.81/322,454.10
  6. Step 6: Final answer
    x = 128,731.05

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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.