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Finding the Fourth Proportional to 636,971.52, 879,359.04 and 493,409.28

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Solution

The fourth proportional to 636,971.52, 879,359.04 and 493,409.28 is: 681,166.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,971.52 : 879,359.04 = 493,409.28 : x
  2. Step 2: Convert to fraction form
    636,971.52/879,359.04 = 493,409.28/x
  3. Step 3: Cross multiply
    636,971.52x = 879,359.04 × 493,409.28
  4. Step 4: Simplify right side
    636,971.52x = 433,883,910,787.89
  5. Step 5: Solve for x
    x = 433,883,910,787.89/636,971.52
  6. Step 6: Final answer
    x = 681,166.89

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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.