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Finding the Fourth Proportional to 660,330.06, 989,524.17 and 390,180.48

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Solution

The fourth proportional to 660,330.06, 989,524.17 and 390,180.48 is: 584,697.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,330.06 : 989,524.17 = 390,180.48 : x
  2. Step 2: Convert to fraction form
    660,330.06/989,524.17 = 390,180.48/x
  3. Step 3: Cross multiply
    660,330.06x = 989,524.17 × 390,180.48
  4. Step 4: Simplify right side
    660,330.06x = 386,093,015,622.20
  5. Step 5: Solve for x
    x = 386,093,015,622.20/660,330.06
  6. Step 6: Final answer
    x = 584,697.02

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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.