Home / 645,348.98-890,583.37-354,990.29

Finding the Fourth Proportional to 645,348.98, 890,583.37 and 354,990.29

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Solution

The fourth proportional to 645,348.98, 890,583.37 and 354,990.29 is: 489,887.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,348.98 : 890,583.37 = 354,990.29 : x
  2. Step 2: Convert to fraction form
    645,348.98/890,583.37 = 354,990.29/x
  3. Step 3: Cross multiply
    645,348.98x = 890,583.37 × 354,990.29
  4. Step 4: Simplify right side
    645,348.98x = 316,148,443,445.09
  5. Step 5: Solve for x
    x = 316,148,443,445.09/645,348.98
  6. Step 6: Final answer
    x = 489,887.57

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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.