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Finding the Fourth Proportional to 283,664.80, 391,459.80 and 156,340.72

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Solution

The fourth proportional to 283,664.80, 391,459.80 and 156,340.72 is: 215,751.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,664.80 : 391,459.80 = 156,340.72 : x
  2. Step 2: Convert to fraction form
    283,664.80/391,459.80 = 156,340.72/x
  3. Step 3: Cross multiply
    283,664.80x = 391,459.80 × 156,340.72
  4. Step 4: Simplify right side
    283,664.80x = 61,201,106,983.06
  5. Step 5: Solve for x
    x = 61,201,106,983.06/283,664.80
  6. Step 6: Final answer
    x = 215,751.50

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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.