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Finding the Fourth Proportional to 651,925.20, 978,325.20 and 385,402.80

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Solution

The fourth proportional to 651,925.20, 978,325.20 and 385,402.80 is: 578,362.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,925.20 : 978,325.20 = 385,402.80 : x
  2. Step 2: Convert to fraction form
    651,925.20/978,325.20 = 385,402.80/x
  3. Step 3: Cross multiply
    651,925.20x = 978,325.20 × 385,402.80
  4. Step 4: Simplify right side
    651,925.20x = 377,049,271,390.56
  5. Step 5: Solve for x
    x = 377,049,271,390.56/651,925.20
  6. Step 6: Final answer
    x = 578,362.78

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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.