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Finding the Fourth Proportional to 661,755.64, 913,385 and 375,443.32

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Solution

The fourth proportional to 661,755.64, 913,385 and 375,443.32 is: 518,203.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,755.64 : 913,385 = 375,443.32 : x
  2. Step 2: Convert to fraction form
    661,755.64/913,385 = 375,443.32/x
  3. Step 3: Cross multiply
    661,755.64x = 913,385 × 375,443.32
  4. Step 4: Simplify right side
    661,755.64x = 342,924,296,838.20
  5. Step 5: Solve for x
    x = 342,924,296,838.20/661,755.64
  6. Step 6: Final answer
    x = 518,203.81

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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.