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Finding the Fourth Proportional to 579,715.20, 869,140.80 and 299,433.60

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Solution

The fourth proportional to 579,715.20, 869,140.80 and 299,433.60 is: 448,927.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,715.20 : 869,140.80 = 299,433.60 : x
  2. Step 2: Convert to fraction form
    579,715.20/869,140.80 = 299,433.60/x
  3. Step 3: Cross multiply
    579,715.20x = 869,140.80 × 299,433.60
  4. Step 4: Simplify right side
    579,715.20x = 260,249,958,650.88
  5. Step 5: Solve for x
    x = 260,249,958,650.88/579,715.20
  6. Step 6: Final answer
    x = 448,927.26

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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.