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Finding the Fourth Proportional to 489,807.70, 684,331.10 and 489,807.70

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Solution

The fourth proportional to 489,807.70, 684,331.10 and 489,807.70 is: 684,331.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,807.70 : 684,331.10 = 489,807.70 : x
  2. Step 2: Convert to fraction form
    489,807.70/684,331.10 = 489,807.70/x
  3. Step 3: Cross multiply
    489,807.70x = 684,331.10 × 489,807.70
  4. Step 4: Simplify right side
    489,807.70x = 335,190,642,129.47
  5. Step 5: Solve for x
    x = 335,190,642,129.47/489,807.70
  6. Step 6: Final answer
    x = 684,331.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.