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Finding the Fourth Proportional to 714,688.42, 986,271.93 and 392,419.39

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Solution

The fourth proportional to 714,688.42, 986,271.93 and 392,419.39 is: 541,539.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,688.42 : 986,271.93 = 392,419.39 : x
  2. Step 2: Convert to fraction form
    714,688.42/986,271.93 = 392,419.39/x
  3. Step 3: Cross multiply
    714,688.42x = 986,271.93 × 392,419.39
  4. Step 4: Simplify right side
    714,688.42x = 387,032,229,144.72
  5. Step 5: Solve for x
    x = 387,032,229,144.72/714,688.42
  6. Step 6: Final answer
    x = 541,539.81

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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.