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Finding the Fourth Proportional to 714,509.91, 986,019.79 and 392,225.49

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Solution

The fourth proportional to 714,509.91, 986,019.79 and 392,225.49 is: 541,269.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,509.91 : 986,019.79 = 392,225.49 : x
  2. Step 2: Convert to fraction form
    714,509.91/986,019.79 = 392,225.49/x
  3. Step 3: Cross multiply
    714,509.91x = 986,019.79 × 392,225.49
  4. Step 4: Simplify right side
    714,509.91x = 386,742,095,282.45
  5. Step 5: Solve for x
    x = 386,742,095,282.45/714,509.91
  6. Step 6: Final answer
    x = 541,269.04

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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.