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Finding the Fourth Proportional to 388,659.85, 581,673.02 and 238,994.94

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Solution

The fourth proportional to 388,659.85, 581,673.02 and 238,994.94 is: 357,682.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,659.85 : 581,673.02 = 238,994.94 : x
  2. Step 2: Convert to fraction form
    388,659.85/581,673.02 = 238,994.94/x
  3. Step 3: Cross multiply
    388,659.85x = 581,673.02 × 238,994.94
  4. Step 4: Simplify right side
    388,659.85x = 139,016,904,411.18
  5. Step 5: Solve for x
    x = 139,016,904,411.18/388,659.85
  6. Step 6: Final answer
    x = 357,682.70

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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.