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Finding the Fourth Proportional to 500,530.95, 690,179.22 and 318,955.28

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Solution

The fourth proportional to 500,530.95, 690,179.22 and 318,955.28 is: 439,805.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,530.95 : 690,179.22 = 318,955.28 : x
  2. Step 2: Convert to fraction form
    500,530.95/690,179.22 = 318,955.28/x
  3. Step 3: Cross multiply
    500,530.95x = 690,179.22 × 318,955.28
  4. Step 4: Simplify right side
    500,530.95x = 220,136,302,914.39
  5. Step 5: Solve for x
    x = 220,136,302,914.39/500,530.95
  6. Step 6: Final answer
    x = 439,805.58

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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.