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Finding the Fourth Proportional to 388,374.84, 535,885.74 and 218,572.92

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Solution

The fourth proportional to 388,374.84, 535,885.74 and 218,572.92 is: 301,590.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,374.84 : 535,885.74 = 218,572.92 : x
  2. Step 2: Convert to fraction form
    388,374.84/535,885.74 = 218,572.92/x
  3. Step 3: Cross multiply
    388,374.84x = 535,885.74 × 218,572.92
  4. Step 4: Simplify right side
    388,374.84x = 117,130,110,978.16
  5. Step 5: Solve for x
    x = 117,130,110,978.16/388,374.84
  6. Step 6: Final answer
    x = 301,590.37

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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.