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Finding the Fourth Proportional to 716,511.89, 988,801.74 and 394,222.93

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Solution

The fourth proportional to 716,511.89, 988,801.74 and 394,222.93 is: 544,036.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,511.89 : 988,801.74 = 394,222.93 : x
  2. Step 2: Convert to fraction form
    716,511.89/988,801.74 = 394,222.93/x
  3. Step 3: Cross multiply
    716,511.89x = 988,801.74 × 394,222.93
  4. Step 4: Simplify right side
    716,511.89x = 389,808,316,659.89
  5. Step 5: Solve for x
    x = 389,808,316,659.89/716,511.89
  6. Step 6: Final answer
    x = 544,036.07

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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.