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Finding the Fourth Proportional to 410,312.40, 615,468.60 and 189,128.40

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Solution

The fourth proportional to 410,312.40, 615,468.60 and 189,128.40 is: 283,692.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,312.40 : 615,468.60 = 189,128.40 : x
  2. Step 2: Convert to fraction form
    410,312.40/615,468.60 = 189,128.40/x
  3. Step 3: Cross multiply
    410,312.40x = 615,468.60 × 189,128.40
  4. Step 4: Simplify right side
    410,312.40x = 116,402,591,568.24
  5. Step 5: Solve for x
    x = 116,402,591,568.24/410,312.40
  6. Step 6: Final answer
    x = 283,692.60

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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.