Home / 670,539.60-1,005,809.40-639,435.60

Finding the Fourth Proportional to 670,539.60, 1,005,809.40 and 639,435.60

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Solution

The fourth proportional to 670,539.60, 1,005,809.40 and 639,435.60 is: 959,153.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,539.60 : 1,005,809.40 = 639,435.60 : x
  2. Step 2: Convert to fraction form
    670,539.60/1,005,809.40 = 639,435.60/x
  3. Step 3: Cross multiply
    670,539.60x = 1,005,809.40 × 639,435.60
  4. Step 4: Simplify right side
    670,539.60x = 643,150,337,174.64
  5. Step 5: Solve for x
    x = 643,150,337,174.64/670,539.60
  6. Step 6: Final answer
    x = 959,153.40

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Double scale
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Similar ratio
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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.