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Finding the Fourth Proportional to 641,954.92, 885,897.70 and 355,475

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Solution

The fourth proportional to 641,954.92, 885,897.70 and 355,475 is: 490,555.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,954.92 : 885,897.70 = 355,475 : x
  2. Step 2: Convert to fraction form
    641,954.92/885,897.70 = 355,475/x
  3. Step 3: Cross multiply
    641,954.92x = 885,897.70 × 355,475
  4. Step 4: Simplify right side
    641,954.92x = 314,914,484,907.50
  5. Step 5: Solve for x
    x = 314,914,484,907.50/641,954.92
  6. Step 6: Final answer
    x = 490,555.45

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1.5x scale

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.