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Finding the Fourth Proportional to 388,312.84, 535,800.18 and 218,510.92

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Solution

The fourth proportional to 388,312.84, 535,800.18 and 218,510.92 is: 301,504.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,312.84 : 535,800.18 = 218,510.92 : x
  2. Step 2: Convert to fraction form
    388,312.84/535,800.18 = 218,510.92/x
  3. Step 3: Cross multiply
    388,312.84x = 535,800.18 × 218,510.92
  4. Step 4: Simplify right side
    388,312.84x = 117,078,190,267.97
  5. Step 5: Solve for x
    x = 117,078,190,267.97/388,312.84
  6. Step 6: Final answer
    x = 301,504.81

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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.