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Finding the Fourth Proportional to 714,242.34, 985,661.87 and 391,973.31

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Solution

The fourth proportional to 714,242.34, 985,661.87 and 391,973.31 is: 540,927.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,242.34 : 985,661.87 = 391,973.31 : x
  2. Step 2: Convert to fraction form
    714,242.34/985,661.87 = 391,973.31/x
  3. Step 3: Cross multiply
    714,242.34x = 985,661.87 × 391,973.31
  4. Step 4: Simplify right side
    714,242.34x = 386,353,143,764.82
  5. Step 5: Solve for x
    x = 386,353,143,764.82/714,242.34
  6. Step 6: Final answer
    x = 540,927.25

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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.