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Finding the Fourth Proportional to 714,243.48, 985,684.36 and 391,965.16

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Solution

The fourth proportional to 714,243.48, 985,684.36 and 391,965.16 is: 540,927.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,243.48 : 985,684.36 = 391,965.16 : x
  2. Step 2: Convert to fraction form
    714,243.48/985,684.36 = 391,965.16/x
  3. Step 3: Cross multiply
    714,243.48x = 985,684.36 × 391,965.16
  4. Step 4: Simplify right side
    714,243.48x = 386,353,927,876.90
  5. Step 5: Solve for x
    x = 386,353,927,876.90/714,243.48
  6. Step 6: Final answer
    x = 540,927.48

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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.