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Finding the Fourth Proportional to 641,603.84, 885,390.72 and 355,124.48

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Solution

The fourth proportional to 641,603.84, 885,390.72 and 355,124.48 is: 490,059.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,603.84 : 885,390.72 = 355,124.48 : x
  2. Step 2: Convert to fraction form
    641,603.84/885,390.72 = 355,124.48/x
  3. Step 3: Cross multiply
    641,603.84x = 885,390.72 × 355,124.48
  4. Step 4: Simplify right side
    641,603.84x = 314,423,919,036.83
  5. Step 5: Solve for x
    x = 314,423,919,036.83/641,603.84
  6. Step 6: Final answer
    x = 490,059.28

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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.