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Finding the Fourth Proportional to 551,216.40, 824,981.40 and 385,328.40

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Solution

The fourth proportional to 551,216.40, 824,981.40 and 385,328.40 is: 576,704.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,216.40 : 824,981.40 = 385,328.40 : x
  2. Step 2: Convert to fraction form
    551,216.40/824,981.40 = 385,328.40/x
  3. Step 3: Cross multiply
    551,216.40x = 824,981.40 × 385,328.40
  4. Step 4: Simplify right side
    551,216.40x = 317,888,762,891.76
  5. Step 5: Solve for x
    x = 317,888,762,891.76/551,216.40
  6. Step 6: Final answer
    x = 576,704.11

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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.