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Finding the Fourth Proportional to 681,422.47, 940,369.30 and 375,509.79

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Solution

The fourth proportional to 681,422.47, 940,369.30 and 375,509.79 is: 518,206.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,422.47 : 940,369.30 = 375,509.79 : x
  2. Step 2: Convert to fraction form
    681,422.47/940,369.30 = 375,509.79/x
  3. Step 3: Cross multiply
    681,422.47x = 940,369.30 × 375,509.79
  4. Step 4: Simplify right side
    681,422.47x = 353,117,877,426.67
  5. Step 5: Solve for x
    x = 353,117,877,426.67/681,422.47
  6. Step 6: Final answer
    x = 518,206.98

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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.