Home / 386,056.40-579,084.60-260,085.20

Finding the Fourth Proportional to 386,056.40, 579,084.60 and 260,085.20

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Solution

The fourth proportional to 386,056.40, 579,084.60 and 260,085.20 is: 390,127.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,056.40 : 579,084.60 = 260,085.20 : x
  2. Step 2: Convert to fraction form
    386,056.40/579,084.60 = 260,085.20/x
  3. Step 3: Cross multiply
    386,056.40x = 579,084.60 × 260,085.20
  4. Step 4: Simplify right side
    386,056.40x = 150,611,334,007.92
  5. Step 5: Solve for x
    x = 150,611,334,007.92/386,056.40
  6. Step 6: Final answer
    x = 390,127.80

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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.