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Finding the Fourth Proportional to 473,687.80, 710,531.70 and 399,038.20

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Solution

The fourth proportional to 473,687.80, 710,531.70 and 399,038.20 is: 598,557.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    473,687.80 : 710,531.70 = 399,038.20 : x
  2. Step 2: Convert to fraction form
    473,687.80/710,531.70 = 399,038.20/x
  3. Step 3: Cross multiply
    473,687.80x = 710,531.70 × 399,038.20
  4. Step 4: Simplify right side
    473,687.80x = 283,529,290,610.94
  5. Step 5: Solve for x
    x = 283,529,290,610.94/473,687.80
  6. Step 6: Final answer
    x = 598,557.30

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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.