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Finding the Fourth Proportional to 385,367.80, 578,051.70 and 369,621.40

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Solution

The fourth proportional to 385,367.80, 578,051.70 and 369,621.40 is: 554,432.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,367.80 : 578,051.70 = 369,621.40 : x
  2. Step 2: Convert to fraction form
    385,367.80/578,051.70 = 369,621.40/x
  3. Step 3: Cross multiply
    385,367.80x = 578,051.70 × 369,621.40
  4. Step 4: Simplify right side
    385,367.80x = 213,660,278,626.38
  5. Step 5: Solve for x
    x = 213,660,278,626.38/385,367.80
  6. Step 6: Final answer
    x = 554,432.10

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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.