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Finding the Fourth Proportional to 714,059.34, 985,369.22 and 391,762.78

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Solution

The fourth proportional to 714,059.34, 985,369.22 and 391,762.78 is: 540,614.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,059.34 : 985,369.22 = 391,762.78 : x
  2. Step 2: Convert to fraction form
    714,059.34/985,369.22 = 391,762.78/x
  3. Step 3: Cross multiply
    714,059.34x = 985,369.22 × 391,762.78
  4. Step 4: Simplify right side
    714,059.34x = 386,030,984,953.63
  5. Step 5: Solve for x
    x = 386,030,984,953.63/714,059.34
  6. Step 6: Final answer
    x = 540,614.71

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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.