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Finding the Fourth Proportional to 708,721.16, 1,063,579.91 and 640,962.45

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Solution

The fourth proportional to 708,721.16, 1,063,579.91 and 640,962.45 is: 961,894.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,721.16 : 1,063,579.91 = 640,962.45 : x
  2. Step 2: Convert to fraction form
    708,721.16/1,063,579.91 = 640,962.45/x
  3. Step 3: Cross multiply
    708,721.16x = 1,063,579.91 × 640,962.45
  4. Step 4: Simplify right side
    708,721.16x = 681,714,781,679.57
  5. Step 5: Solve for x
    x = 681,714,781,679.57/708,721.16
  6. Step 6: Final answer
    x = 961,894.22

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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.