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Finding the Fourth Proportional to 714,345.48, 985,765.14 and 392,056.20

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Solution

The fourth proportional to 714,345.48, 985,765.14 and 392,056.20 is: 541,020.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,345.48 : 985,765.14 = 392,056.20 : x
  2. Step 2: Convert to fraction form
    714,345.48/985,765.14 = 392,056.20/x
  3. Step 3: Cross multiply
    714,345.48x = 985,765.14 × 392,056.20
  4. Step 4: Simplify right side
    714,345.48x = 386,475,334,880.87
  5. Step 5: Solve for x
    x = 386,475,334,880.87/714,345.48
  6. Step 6: Final answer
    x = 541,020.20

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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.