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Finding the Fourth Proportional to 679,291.60, 937,474.68 and 407,369.76

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Solution

The fourth proportional to 679,291.60, 937,474.68 and 407,369.76 is: 562,201.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,291.60 : 937,474.68 = 407,369.76 : x
  2. Step 2: Convert to fraction form
    679,291.60/937,474.68 = 407,369.76/x
  3. Step 3: Cross multiply
    679,291.60x = 937,474.68 × 407,369.76
  4. Step 4: Simplify right side
    679,291.60x = 381,898,835,397.68
  5. Step 5: Solve for x
    x = 381,898,835,397.68/679,291.60
  6. Step 6: Final answer
    x = 562,201.62

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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.