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Finding the Fourth Proportional to 614,570.40, 921,985.20 and 259,401.60

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Solution

The fourth proportional to 614,570.40, 921,985.20 and 259,401.60 is: 389,157.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,570.40 : 921,985.20 = 259,401.60 : x
  2. Step 2: Convert to fraction form
    614,570.40/921,985.20 = 259,401.60/x
  3. Step 3: Cross multiply
    614,570.40x = 921,985.20 × 259,401.60
  4. Step 4: Simplify right side
    614,570.40x = 239,164,436,056.32
  5. Step 5: Solve for x
    x = 239,164,436,056.32/614,570.40
  6. Step 6: Final answer
    x = 389,157.10

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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.