Home / 645,109.63-890,281.67-358,634.50

Finding the Fourth Proportional to 645,109.63, 890,281.67 and 358,634.50

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Solution

The fourth proportional to 645,109.63, 890,281.67 and 358,634.50 is: 494,932.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,109.63 : 890,281.67 = 358,634.50 : x
  2. Step 2: Convert to fraction form
    645,109.63/890,281.67 = 358,634.50/x
  3. Step 3: Cross multiply
    645,109.63x = 890,281.67 × 358,634.50
  4. Step 4: Simplify right side
    645,109.63x = 319,285,722,476.20
  5. Step 5: Solve for x
    x = 319,285,722,476.20/645,109.63
  6. Step 6: Final answer
    x = 494,932.50

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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.