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Finding the Fourth Proportional to 388,432.51, 536,087.96 and 218,699.71

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Solution

The fourth proportional to 388,432.51, 536,087.96 and 218,699.71 is: 301,834.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,432.51 : 536,087.96 = 218,699.71 : x
  2. Step 2: Convert to fraction form
    388,432.51/536,087.96 = 218,699.71/x
  3. Step 3: Cross multiply
    388,432.51x = 536,087.96 × 218,699.71
  4. Step 4: Simplify right side
    388,432.51x = 117,242,281,386.49
  5. Step 5: Solve for x
    x = 117,242,281,386.49/388,432.51
  6. Step 6: Final answer
    x = 301,834.37

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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.