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Finding the Fourth Proportional to 978,455.70, 1,467,683.55 and 838,487.70

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Solution

The fourth proportional to 978,455.70, 1,467,683.55 and 838,487.70 is: 1,257,731.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,455.70 : 1,467,683.55 = 838,487.70 : x
  2. Step 2: Convert to fraction form
    978,455.70/1,467,683.55 = 838,487.70/x
  3. Step 3: Cross multiply
    978,455.70x = 1,467,683.55 × 838,487.70
  4. Step 4: Simplify right side
    978,455.70x = 1,230,634,604,167.34
  5. Step 5: Solve for x
    x = 1,230,634,604,167.34/978,455.70
  6. Step 6: Final answer
    x = 1,257,731.55

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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.