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Finding the Fourth Proportional to 641,686.40, 963,220.80 and 361,750.40

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Solution

The fourth proportional to 641,686.40, 963,220.80 and 361,750.40 is: 543,015.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,686.40 : 963,220.80 = 361,750.40 : x
  2. Step 2: Convert to fraction form
    641,686.40/963,220.80 = 361,750.40/x
  3. Step 3: Cross multiply
    641,686.40x = 963,220.80 × 361,750.40
  4. Step 4: Simplify right side
    641,686.40x = 348,445,509,688.32
  5. Step 5: Solve for x
    x = 348,445,509,688.32/641,686.40
  6. Step 6: Final answer
    x = 543,015.26

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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.