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Finding the Fourth Proportional to 640,491.26, 883,923.72 and 354,005.16

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Solution

The fourth proportional to 640,491.26, 883,923.72 and 354,005.16 is: 488,552.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,491.26 : 883,923.72 = 354,005.16 : x
  2. Step 2: Convert to fraction form
    640,491.26/883,923.72 = 354,005.16/x
  3. Step 3: Cross multiply
    640,491.26x = 883,923.72 × 354,005.16
  4. Step 4: Simplify right side
    640,491.26x = 312,913,557,926.40
  5. Step 5: Solve for x
    x = 312,913,557,926.40/640,491.26
  6. Step 6: Final answer
    x = 488,552.42

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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.