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Finding the Fourth Proportional to 666,784.04, 999,998.40 and 186,985.40

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Solution

The fourth proportional to 666,784.04, 999,998.40 and 186,985.40 is: 280,428.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,784.04 : 999,998.40 = 186,985.40 : x
  2. Step 2: Convert to fraction form
    666,784.04/999,998.40 = 186,985.40/x
  3. Step 3: Cross multiply
    666,784.04x = 999,998.40 × 186,985.40
  4. Step 4: Simplify right side
    666,784.04x = 186,985,100,823.36
  5. Step 5: Solve for x
    x = 186,985,100,823.36/666,784.04
  6. Step 6: Final answer
    x = 280,428.28

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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.