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Finding the Fourth Proportional to 665,265.48, 918,368.48 and 423,879

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Solution

The fourth proportional to 665,265.48, 918,368.48 and 423,879 is: 585,145.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,265.48 : 918,368.48 = 423,879 : x
  2. Step 2: Convert to fraction form
    665,265.48/918,368.48 = 423,879/x
  3. Step 3: Cross multiply
    665,265.48x = 918,368.48 × 423,879
  4. Step 4: Simplify right side
    665,265.48x = 389,277,112,933.92
  5. Step 5: Solve for x
    x = 389,277,112,933.92/665,265.48
  6. Step 6: Final answer
    x = 585,145.52

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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.