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Finding the Fourth Proportional to 388,910.10, 583,365.15 and 242,891.40

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Solution

The fourth proportional to 388,910.10, 583,365.15 and 242,891.40 is: 364,337.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,910.10 : 583,365.15 = 242,891.40 : x
  2. Step 2: Convert to fraction form
    388,910.10/583,365.15 = 242,891.40/x
  3. Step 3: Cross multiply
    388,910.10x = 583,365.15 × 242,891.40
  4. Step 4: Simplify right side
    388,910.10x = 141,694,377,994.71
  5. Step 5: Solve for x
    x = 141,694,377,994.71/388,910.10
  6. Step 6: Final answer
    x = 364,337.10

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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.