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Finding the Fourth Proportional to 640,061.58, 883,317.87 and 353,579.34

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Solution

The fourth proportional to 640,061.58, 883,317.87 and 353,579.34 is: 487,957.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,061.58 : 883,317.87 = 353,579.34 : x
  2. Step 2: Convert to fraction form
    640,061.58/883,317.87 = 353,579.34/x
  3. Step 3: Cross multiply
    640,061.58x = 883,317.87 × 353,579.34
  4. Step 4: Simplify right side
    640,061.58x = 312,322,949,484.81
  5. Step 5: Solve for x
    x = 312,322,949,484.81/640,061.58
  6. Step 6: Final answer
    x = 487,957.66

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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.