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Finding the Fourth Proportional to 651,902.20, 978,429.30 and 385,329.40

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Solution

The fourth proportional to 651,902.20, 978,429.30 and 385,329.40 is: 578,334.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,902.20 : 978,429.30 = 385,329.40 : x
  2. Step 2: Convert to fraction form
    651,902.20/978,429.30 = 385,329.40/x
  3. Step 3: Cross multiply
    651,902.20x = 978,429.30 × 385,329.40
  4. Step 4: Simplify right side
    651,902.20x = 377,017,575,111.42
  5. Step 5: Solve for x
    x = 377,017,575,111.42/651,902.20
  6. Step 6: Final answer
    x = 578,334.56

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.