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Finding the Fourth Proportional to 695,982.78, 960,523.65 and 390,111.12

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Solution

The fourth proportional to 695,982.78, 960,523.65 and 390,111.12 is: 538,391.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,982.78 : 960,523.65 = 390,111.12 : x
  2. Step 2: Convert to fraction form
    695,982.78/960,523.65 = 390,111.12/x
  3. Step 3: Cross multiply
    695,982.78x = 960,523.65 × 390,111.12
  4. Step 4: Simplify right side
    695,982.78x = 374,710,956,887.99
  5. Step 5: Solve for x
    x = 374,710,956,887.99/695,982.78
  6. Step 6: Final answer
    x = 538,391.13

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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.