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Finding the Fourth Proportional to 640,739.76, 960,813.81 and 235,830.26

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Solution

The fourth proportional to 640,739.76, 960,813.81 and 235,830.26 is: 353,636.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,739.76 : 960,813.81 = 235,830.26 : x
  2. Step 2: Convert to fraction form
    640,739.76/960,813.81 = 235,830.26/x
  3. Step 3: Cross multiply
    640,739.76x = 960,813.81 × 235,830.26
  4. Step 4: Simplify right side
    640,739.76x = 226,588,969,444.74
  5. Step 5: Solve for x
    x = 226,588,969,444.74/640,739.76
  6. Step 6: Final answer
    x = 353,636.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.