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Finding the Fourth Proportional to 640,557, 883,962.18 and 354,063.24

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Solution

The fourth proportional to 640,557, 883,962.18 and 354,063.24 is: 488,603.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,557 : 883,962.18 = 354,063.24 : x
  2. Step 2: Convert to fraction form
    640,557/883,962.18 = 354,063.24/x
  3. Step 3: Cross multiply
    640,557x = 883,962.18 × 354,063.24
  4. Step 4: Simplify right side
    640,557x = 312,978,513,488.26
  5. Step 5: Solve for x
    x = 312,978,513,488.26/640,557
  6. Step 6: Final answer
    x = 488,603.69

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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.