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Finding the Fourth Proportional to 646,812.30, 970,218.45 and 619,509.90

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Solution

The fourth proportional to 646,812.30, 970,218.45 and 619,509.90 is: 929,264.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,812.30 : 970,218.45 = 619,509.90 : x
  2. Step 2: Convert to fraction form
    646,812.30/970,218.45 = 619,509.90/x
  3. Step 3: Cross multiply
    646,812.30x = 970,218.45 × 619,509.90
  4. Step 4: Simplify right side
    646,812.30x = 601,059,934,937.66
  5. Step 5: Solve for x
    x = 601,059,934,937.66/646,812.30
  6. Step 6: Final answer
    x = 929,264.85

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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.