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Finding the Fourth Proportional to 978,410.76, 1,470,415.48 and 480,124.68

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Solution

The fourth proportional to 978,410.76, 1,470,415.48 and 480,124.68 is: 721,560.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,410.76 : 1,470,415.48 = 480,124.68 : x
  2. Step 2: Convert to fraction form
    978,410.76/1,470,415.48 = 480,124.68/x
  3. Step 3: Cross multiply
    978,410.76x = 1,470,415.48 × 480,124.68
  4. Step 4: Simplify right side
    978,410.76x = 705,982,761,802.05
  5. Step 5: Solve for x
    x = 705,982,761,802.05/978,410.76
  6. Step 6: Final answer
    x = 721,560.71

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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.