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Finding the Fourth Proportional to 388,401.84, 535,923 and 218,599.92

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Solution

The fourth proportional to 388,401.84, 535,923 and 218,599.92 is: 301,627.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,401.84 : 535,923 = 218,599.92 : x
  2. Step 2: Convert to fraction form
    388,401.84/535,923 = 218,599.92/x
  3. Step 3: Cross multiply
    388,401.84x = 535,923 × 218,599.92
  4. Step 4: Simplify right side
    388,401.84x = 117,152,724,926.16
  5. Step 5: Solve for x
    x = 117,152,724,926.16/388,401.84
  6. Step 6: Final answer
    x = 301,627.63

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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.