Home / 642,705.16-886,917.72-356,219.08

Finding the Fourth Proportional to 642,705.16, 886,917.72 and 356,219.08

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Solution

The fourth proportional to 642,705.16, 886,917.72 and 356,219.08 is: 491,573.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,705.16 : 886,917.72 = 356,219.08 : x
  2. Step 2: Convert to fraction form
    642,705.16/886,917.72 = 356,219.08/x
  3. Step 3: Cross multiply
    642,705.16x = 886,917.72 × 356,219.08
  4. Step 4: Simplify right side
    642,705.16x = 315,937,014,254.10
  5. Step 5: Solve for x
    x = 315,937,014,254.10/642,705.16
  6. Step 6: Final answer
    x = 491,573.79

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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.