Home / 645,110.63-890,283.05-358,635.50

Finding the Fourth Proportional to 645,110.63, 890,283.05 and 358,635.50

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Solution

The fourth proportional to 645,110.63, 890,283.05 and 358,635.50 is: 494,933.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,110.63 : 890,283.05 = 358,635.50 : x
  2. Step 2: Convert to fraction form
    645,110.63/890,283.05 = 358,635.50/x
  3. Step 3: Cross multiply
    645,110.63x = 890,283.05 × 358,635.50
  4. Step 4: Simplify right side
    645,110.63x = 319,287,106,778.28
  5. Step 5: Solve for x
    x = 319,287,106,778.28/645,110.63
  6. Step 6: Final answer
    x = 494,933.88

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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.