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Finding the Fourth Proportional to 470,761.60, 649,586.88 and 279,705.28

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Solution

The fourth proportional to 470,761.60, 649,586.88 and 279,705.28 is: 385,955.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,761.60 : 649,586.88 = 279,705.28 : x
  2. Step 2: Convert to fraction form
    470,761.60/649,586.88 = 279,705.28/x
  3. Step 3: Cross multiply
    470,761.60x = 649,586.88 × 279,705.28
  4. Step 4: Simplify right side
    470,761.60x = 181,692,880,154.73
  5. Step 5: Solve for x
    x = 181,692,880,154.73/470,761.60
  6. Step 6: Final answer
    x = 385,955.18

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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.