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Finding the Fourth Proportional to 659,336.36, 910,000.67 and 387,404.19

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Solution

The fourth proportional to 659,336.36, 910,000.67 and 387,404.19 is: 534,686.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,336.36 : 910,000.67 = 387,404.19 : x
  2. Step 2: Convert to fraction form
    659,336.36/910,000.67 = 387,404.19/x
  3. Step 3: Cross multiply
    659,336.36x = 910,000.67 × 387,404.19
  4. Step 4: Simplify right side
    659,336.36x = 352,538,070,523.79
  5. Step 5: Solve for x
    x = 352,538,070,523.79/659,336.36
  6. Step 6: Final answer
    x = 534,686.23

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1.5x scale

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.