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Finding the Fourth Proportional to 711,683.01, 982,113.66 and 405,749.66

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Solution

The fourth proportional to 711,683.01, 982,113.66 and 405,749.66 is: 559,929.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,683.01 : 982,113.66 = 405,749.66 : x
  2. Step 2: Convert to fraction form
    711,683.01/982,113.66 = 405,749.66/x
  3. Step 3: Cross multiply
    711,683.01x = 982,113.66 × 405,749.66
  4. Step 4: Simplify right side
    711,683.01x = 398,492,278,715.79
  5. Step 5: Solve for x
    x = 398,492,278,715.79/711,683.01
  6. Step 6: Final answer
    x = 559,929.45

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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.