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Finding the Fourth Proportional to 642,465.88, 886,603.95 and 352,031.29

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Solution

The fourth proportional to 642,465.88, 886,603.95 and 352,031.29 is: 485,803.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,465.88 : 886,603.95 = 352,031.29 : x
  2. Step 2: Convert to fraction form
    642,465.88/886,603.95 = 352,031.29/x
  3. Step 3: Cross multiply
    642,465.88x = 886,603.95 × 352,031.29
  4. Step 4: Simplify right side
    642,465.88x = 312,112,332,237.60
  5. Step 5: Solve for x
    x = 312,112,332,237.60/642,465.88
  6. Step 6: Final answer
    x = 485,803.75

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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.