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Finding the Fourth Proportional to 666,365.86, 999,547.57 and 217,086.20

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Solution

The fourth proportional to 666,365.86, 999,547.57 and 217,086.20 is: 325,628.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,365.86 : 999,547.57 = 217,086.20 : x
  2. Step 2: Convert to fraction form
    666,365.86/999,547.57 = 217,086.20/x
  3. Step 3: Cross multiply
    666,365.86x = 999,547.57 × 217,086.20
  4. Step 4: Simplify right side
    666,365.86x = 216,987,983,690.53
  5. Step 5: Solve for x
    x = 216,987,983,690.53/666,365.86
  6. Step 6: Final answer
    x = 325,628.90

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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.