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Finding the Fourth Proportional to 674,860, 931,327.16 and 368,929.48

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Solution

The fourth proportional to 674,860, 931,327.16 and 368,929.48 is: 509,133.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,860 : 931,327.16 = 368,929.48 : x
  2. Step 2: Convert to fraction form
    674,860/931,327.16 = 368,929.48/x
  3. Step 3: Cross multiply
    674,860x = 931,327.16 × 368,929.48
  4. Step 4: Simplify right side
    674,860x = 343,594,044,848.68
  5. Step 5: Solve for x
    x = 343,594,044,848.68/674,860
  6. Step 6: Final answer
    x = 509,133.81

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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.