Home / 645,127.88-890,299.28-354,761.57

Finding the Fourth Proportional to 645,127.88, 890,299.28 and 354,761.57

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Solution

The fourth proportional to 645,127.88, 890,299.28 and 354,761.57 is: 489,583.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,127.88 : 890,299.28 = 354,761.57 : x
  2. Step 2: Convert to fraction form
    645,127.88/890,299.28 = 354,761.57/x
  3. Step 3: Cross multiply
    645,127.88x = 890,299.28 × 354,761.57
  4. Step 4: Simplify right side
    645,127.88x = 315,843,973,455.32
  5. Step 5: Solve for x
    x = 315,843,973,455.32/645,127.88
  6. Step 6: Final answer
    x = 489,583.52

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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.