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Finding the Fourth Proportional to 660,207.48, 911,108.16 and 373,721.64

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Solution

The fourth proportional to 660,207.48, 911,108.16 and 373,721.64 is: 515,748.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,207.48 : 911,108.16 = 373,721.64 : x
  2. Step 2: Convert to fraction form
    660,207.48/911,108.16 = 373,721.64/x
  3. Step 3: Cross multiply
    660,207.48x = 911,108.16 × 373,721.64
  4. Step 4: Simplify right side
    660,207.48x = 340,500,835,772.58
  5. Step 5: Solve for x
    x = 340,500,835,772.58/660,207.48
  6. Step 6: Final answer
    x = 515,748.22

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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.