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Finding the Fourth Proportional to 714,429.34, 985,925.20 and 392,169.40

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Solution

The fourth proportional to 714,429.34, 985,925.20 and 392,169.40 is: 541,200.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,429.34 : 985,925.20 = 392,169.40 : x
  2. Step 2: Convert to fraction form
    714,429.34/985,925.20 = 392,169.40/x
  3. Step 3: Cross multiply
    714,429.34x = 985,925.20 × 392,169.40
  4. Step 4: Simplify right side
    714,429.34x = 386,649,689,199.25
  5. Step 5: Solve for x
    x = 386,649,689,199.25/714,429.34
  6. Step 6: Final answer
    x = 541,200.75

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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.