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Finding the Fourth Proportional to 554,144.40, 831,022.20 and 287,816.40

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Solution

The fourth proportional to 554,144.40, 831,022.20 and 287,816.40 is: 431,623.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,144.40 : 831,022.20 = 287,816.40 : x
  2. Step 2: Convert to fraction form
    554,144.40/831,022.20 = 287,816.40/x
  3. Step 3: Cross multiply
    554,144.40x = 831,022.20 × 287,816.40
  4. Step 4: Simplify right side
    554,144.40x = 239,181,817,924.08
  5. Step 5: Solve for x
    x = 239,181,817,924.08/554,144.40
  6. Step 6: Final answer
    x = 431,623.63

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1.5x scale

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.