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Finding the Fourth Proportional to 717,066.68, 989,532.81 and 394,779.20

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Solution

The fourth proportional to 717,066.68, 989,532.81 and 394,779.20 is: 544,784.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,066.68 : 989,532.81 = 394,779.20 : x
  2. Step 2: Convert to fraction form
    717,066.68/989,532.81 = 394,779.20/x
  3. Step 3: Cross multiply
    717,066.68x = 989,532.81 × 394,779.20
  4. Step 4: Simplify right side
    717,066.68x = 390,646,966,157.89
  5. Step 5: Solve for x
    x = 390,646,966,157.89/717,066.68
  6. Step 6: Final answer
    x = 544,784.72

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Double scale
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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.