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Finding the Fourth Proportional to 388,030.40, 535,486.40 and 218,263.04

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Solution

The fourth proportional to 388,030.40, 535,486.40 and 218,263.04 is: 301,205.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,030.40 : 535,486.40 = 218,263.04 : x
  2. Step 2: Convert to fraction form
    388,030.40/535,486.40 = 218,263.04/x
  3. Step 3: Cross multiply
    388,030.40x = 535,486.40 × 218,263.04
  4. Step 4: Simplify right side
    388,030.40x = 116,876,889,542.66
  5. Step 5: Solve for x
    x = 116,876,889,542.66/388,030.40
  6. Step 6: Final answer
    x = 301,205.50

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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.