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Finding the Fourth Proportional to 666,186.90, 919,638.15 and 424,793.94

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Solution

The fourth proportional to 666,186.90, 919,638.15 and 424,793.94 is: 586,407.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,186.90 : 919,638.15 = 424,793.94 : x
  2. Step 2: Convert to fraction form
    666,186.90/919,638.15 = 424,793.94/x
  3. Step 3: Cross multiply
    666,186.90x = 919,638.15 × 424,793.94
  4. Step 4: Simplify right side
    666,186.90x = 390,656,713,112.81
  5. Step 5: Solve for x
    x = 390,656,713,112.81/666,186.90
  6. Step 6: Final answer
    x = 586,407.08

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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.