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Finding the Fourth Proportional to 666,488.16, 919,863.64 and 408,508.60

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Solution

The fourth proportional to 666,488.16, 919,863.64 and 408,508.60 is: 563,809.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,488.16 : 919,863.64 = 408,508.60 : x
  2. Step 2: Convert to fraction form
    666,488.16/919,863.64 = 408,508.60/x
  3. Step 3: Cross multiply
    666,488.16x = 919,863.64 × 408,508.60
  4. Step 4: Simplify right side
    666,488.16x = 375,772,207,767.30
  5. Step 5: Solve for x
    x = 375,772,207,767.30/666,488.16
  6. Step 6: Final answer
    x = 563,809.28

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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.