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Finding the Fourth Proportional to 383,155.68, 528,754.85 and 213,389.80

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Solution

The fourth proportional to 383,155.68, 528,754.85 and 213,389.80 is: 294,477.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,155.68 : 528,754.85 = 213,389.80 : x
  2. Step 2: Convert to fraction form
    383,155.68/528,754.85 = 213,389.80/x
  3. Step 3: Cross multiply
    383,155.68x = 528,754.85 × 213,389.80
  4. Step 4: Simplify right side
    383,155.68x = 112,830,891,690.53
  5. Step 5: Solve for x
    x = 112,830,891,690.53/383,155.68
  6. Step 6: Final answer
    x = 294,477.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.