Home / 642,051.71-885,999.76-351,664.55

Finding the Fourth Proportional to 642,051.71, 885,999.76 and 351,664.55

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Solution

The fourth proportional to 642,051.71, 885,999.76 and 351,664.55 is: 485,279.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,051.71 : 885,999.76 = 351,664.55 : x
  2. Step 2: Convert to fraction form
    642,051.71/885,999.76 = 351,664.55/x
  3. Step 3: Cross multiply
    642,051.71x = 885,999.76 × 351,664.55
  4. Step 4: Simplify right side
    642,051.71x = 311,574,705,665.27
  5. Step 5: Solve for x
    x = 311,574,705,665.27/642,051.71
  6. Step 6: Final answer
    x = 485,279.77

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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.