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Finding the Fourth Proportional to 917,130.60, 1,375,695.90 and 693,181.80

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Solution

The fourth proportional to 917,130.60, 1,375,695.90 and 693,181.80 is: 1,039,772.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,130.60 : 1,375,695.90 = 693,181.80 : x
  2. Step 2: Convert to fraction form
    917,130.60/1,375,695.90 = 693,181.80/x
  3. Step 3: Cross multiply
    917,130.60x = 1,375,695.90 × 693,181.80
  4. Step 4: Simplify right side
    917,130.60x = 953,607,360,214.62
  5. Step 5: Solve for x
    x = 953,607,360,214.62/917,130.60
  6. Step 6: Final answer
    x = 1,039,772.70

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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.