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Finding the Fourth Proportional to 619,689.60, 929,534.40 and 407,113.20

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Solution

The fourth proportional to 619,689.60, 929,534.40 and 407,113.20 is: 610,669.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,689.60 : 929,534.40 = 407,113.20 : x
  2. Step 2: Convert to fraction form
    619,689.60/929,534.40 = 407,113.20/x
  3. Step 3: Cross multiply
    619,689.60x = 929,534.40 × 407,113.20
  4. Step 4: Simplify right side
    619,689.60x = 378,425,724,094.08
  5. Step 5: Solve for x
    x = 378,425,724,094.08/619,689.60
  6. Step 6: Final answer
    x = 610,669.80

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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.