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Finding the Fourth Proportional to 383,156.68, 528,756.23 and 213,390.80

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Solution

The fourth proportional to 383,156.68, 528,756.23 and 213,390.80 is: 294,479.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,156.68 : 528,756.23 = 213,390.80 : x
  2. Step 2: Convert to fraction form
    383,156.68/528,756.23 = 213,390.80/x
  3. Step 3: Cross multiply
    383,156.68x = 528,756.23 × 213,390.80
  4. Step 4: Simplify right side
    383,156.68x = 112,831,714,924.68
  5. Step 5: Solve for x
    x = 112,831,714,924.68/383,156.68
  6. Step 6: Final answer
    x = 294,479.31

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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.