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Finding the Fourth Proportional to 665,263.48, 918,365.72 and 423,877

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Solution

The fourth proportional to 665,263.48, 918,365.72 and 423,877 is: 585,142.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,263.48 : 918,365.72 = 423,877 : x
  2. Step 2: Convert to fraction form
    665,263.48/918,365.72 = 423,877/x
  3. Step 3: Cross multiply
    665,263.48x = 918,365.72 × 423,877
  4. Step 4: Simplify right side
    665,263.48x = 389,274,106,296.44
  5. Step 5: Solve for x
    x = 389,274,106,296.44/665,263.48
  6. Step 6: Final answer
    x = 585,142.76

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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.