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Finding the Fourth Proportional to 865,612.10, 1,194,606.51 and 478,419.20

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Solution

The fourth proportional to 865,612.10, 1,194,606.51 and 478,419.20 is: 660,252.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,612.10 : 1,194,606.51 = 478,419.20 : x
  2. Step 2: Convert to fraction form
    865,612.10/1,194,606.51 = 478,419.20/x
  3. Step 3: Cross multiply
    865,612.10x = 1,194,606.51 × 478,419.20
  4. Step 4: Simplify right side
    865,612.10x = 571,522,690,828.99
  5. Step 5: Solve for x
    x = 571,522,690,828.99/865,612.10
  6. Step 6: Final answer
    x = 660,252.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.