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Finding the Fourth Proportional to 661,758.84, 992,154.32 and 212,223.80

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Solution

The fourth proportional to 661,758.84, 992,154.32 and 212,223.80 is: 318,180.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,758.84 : 992,154.32 = 212,223.80 : x
  2. Step 2: Convert to fraction form
    661,758.84/992,154.32 = 212,223.80/x
  3. Step 3: Cross multiply
    661,758.84x = 992,154.32 × 212,223.80
  4. Step 4: Simplify right side
    661,758.84x = 210,558,759,976.82
  5. Step 5: Solve for x
    x = 210,558,759,976.82/661,758.84
  6. Step 6: Final answer
    x = 318,180.50

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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.