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Finding the Fourth Proportional to 554,811.20, 831,730.80 and 376,740.80

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Solution

The fourth proportional to 554,811.20, 831,730.80 and 376,740.80 is: 564,781.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,811.20 : 831,730.80 = 376,740.80 : x
  2. Step 2: Convert to fraction form
    554,811.20/831,730.80 = 376,740.80/x
  3. Step 3: Cross multiply
    554,811.20x = 831,730.80 × 376,740.80
  4. Step 4: Simplify right side
    554,811.20x = 313,346,926,976.64
  5. Step 5: Solve for x
    x = 313,346,926,976.64/554,811.20
  6. Step 6: Final answer
    x = 564,781.18

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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.