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Finding the Fourth Proportional to 642,393.16, 886,491.07 and 355,907.50

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Solution

The fourth proportional to 642,393.16, 886,491.07 and 355,907.50 is: 491,145.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,393.16 : 886,491.07 = 355,907.50 : x
  2. Step 2: Convert to fraction form
    642,393.16/886,491.07 = 355,907.50/x
  3. Step 3: Cross multiply
    642,393.16x = 886,491.07 × 355,907.50
  4. Step 4: Simplify right side
    642,393.16x = 315,508,820,496.03
  5. Step 5: Solve for x
    x = 315,508,820,496.03/642,393.16
  6. Step 6: Final answer
    x = 491,145.98

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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.