Home / 661,308.23-911,748.77-428,320.64

Finding the Fourth Proportional to 661,308.23, 911,748.77 and 428,320.64

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Solution

The fourth proportional to 661,308.23, 911,748.77 and 428,320.64 is: 590,527.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,308.23 : 911,748.77 = 428,320.64 : x
  2. Step 2: Convert to fraction form
    661,308.23/911,748.77 = 428,320.64/x
  3. Step 3: Cross multiply
    661,308.23x = 911,748.77 × 428,320.64
  4. Step 4: Simplify right side
    661,308.23x = 390,520,816,685.61
  5. Step 5: Solve for x
    x = 390,520,816,685.61/661,308.23
  6. Step 6: Final answer
    x = 590,527.68

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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.