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Finding the Fourth Proportional to 665,444.10, 996,853.95 and 398,411.40

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Solution

The fourth proportional to 665,444.10, 996,853.95 and 398,411.40 is: 596,831.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,444.10 : 996,853.95 = 398,411.40 : x
  2. Step 2: Convert to fraction form
    665,444.10/996,853.95 = 398,411.40/x
  3. Step 3: Cross multiply
    665,444.10x = 996,853.95 × 398,411.40
  4. Step 4: Simplify right side
    665,444.10x = 397,157,977,815.03
  5. Step 5: Solve for x
    x = 397,157,977,815.03/665,444.10
  6. Step 6: Final answer
    x = 596,831.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.