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Finding the Fourth Proportional to 388,663.94, 581,679.08 and 238,999.02

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Solution

The fourth proportional to 388,663.94, 581,679.08 and 238,999.02 is: 357,688.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,663.94 : 581,679.08 = 238,999.02 : x
  2. Step 2: Convert to fraction form
    388,663.94/581,679.08 = 238,999.02/x
  3. Step 3: Cross multiply
    388,663.94x = 581,679.08 × 238,999.02
  4. Step 4: Simplify right side
    388,663.94x = 139,020,730,074.50
  5. Step 5: Solve for x
    x = 139,020,730,074.50/388,663.94
  6. Step 6: Final answer
    x = 357,688.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.