Home / 645,124.88-890,230.82-358,637.60

Finding the Fourth Proportional to 645,124.88, 890,230.82 and 358,637.60

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Solution

The fourth proportional to 645,124.88, 890,230.82 and 358,637.60 is: 494,896.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,124.88 : 890,230.82 = 358,637.60 : x
  2. Step 2: Convert to fraction form
    645,124.88/890,230.82 = 358,637.60/x
  3. Step 3: Cross multiply
    645,124.88x = 890,230.82 × 358,637.60
  4. Step 4: Simplify right side
    645,124.88x = 319,270,244,730.83
  5. Step 5: Solve for x
    x = 319,270,244,730.83/645,124.88
  6. Step 6: Final answer
    x = 494,896.81

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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.