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Finding the Fourth Proportional to 615,069.31, 921,855.97 and 435,206.56

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Solution

The fourth proportional to 615,069.31, 921,855.97 and 435,206.56 is: 652,280.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,069.31 : 921,855.97 = 435,206.56 : x
  2. Step 2: Convert to fraction form
    615,069.31/921,855.97 = 435,206.56/x
  3. Step 3: Cross multiply
    615,069.31x = 921,855.97 × 435,206.56
  4. Step 4: Simplify right side
    615,069.31x = 401,197,758,733.85
  5. Step 5: Solve for x
    x = 401,197,758,733.85/615,069.31
  6. Step 6: Final answer
    x = 652,280.57

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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.