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Finding the Fourth Proportional to 978,809.76, 1,350,454.76 and 570,622.67

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Solution

The fourth proportional to 978,809.76, 1,350,454.76 and 570,622.67 is: 787,282.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,809.76 : 1,350,454.76 = 570,622.67 : x
  2. Step 2: Convert to fraction form
    978,809.76/1,350,454.76 = 570,622.67/x
  3. Step 3: Cross multiply
    978,809.76x = 1,350,454.76 × 570,622.67
  4. Step 4: Simplify right side
    978,809.76x = 770,600,091,260.02
  5. Step 5: Solve for x
    x = 770,600,091,260.02/978,809.76
  6. Step 6: Final answer
    x = 787,282.80

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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.