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Finding the Fourth Proportional to 528,012.64, 791,834.64 and 212,387.68

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Solution

The fourth proportional to 528,012.64, 791,834.64 and 212,387.68 is: 318,507.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,012.64 : 791,834.64 = 212,387.68 : x
  2. Step 2: Convert to fraction form
    528,012.64/791,834.64 = 212,387.68/x
  3. Step 3: Cross multiply
    528,012.64x = 791,834.64 × 212,387.68
  4. Step 4: Simplify right side
    528,012.64x = 168,175,922,133.24
  5. Step 5: Solve for x
    x = 168,175,922,133.24/528,012.64
  6. Step 6: Final answer
    x = 318,507.38

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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.