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Finding the Fourth Proportional to 640,978.20, 960,200.10 and 562,181.40

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Solution

The fourth proportional to 640,978.20, 960,200.10 and 562,181.40 is: 842,160.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,978.20 : 960,200.10 = 562,181.40 : x
  2. Step 2: Convert to fraction form
    640,978.20/960,200.10 = 562,181.40/x
  3. Step 3: Cross multiply
    640,978.20x = 960,200.10 × 562,181.40
  4. Step 4: Simplify right side
    640,978.20x = 539,806,636,498.14
  5. Step 5: Solve for x
    x = 539,806,636,498.14/640,978.20
  6. Step 6: Final answer
    x = 842,160.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.