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Finding the Fourth Proportional to 655,978.32, 984,278.52 and 390,263.76

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Solution

The fourth proportional to 655,978.32, 984,278.52 and 390,263.76 is: 585,580.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,978.32 : 984,278.52 = 390,263.76 : x
  2. Step 2: Convert to fraction form
    655,978.32/984,278.52 = 390,263.76/x
  3. Step 3: Cross multiply
    655,978.32x = 984,278.52 × 390,263.76
  4. Step 4: Simplify right side
    655,978.32x = 384,128,236,102.44
  5. Step 5: Solve for x
    x = 384,128,236,102.44/655,978.32
  6. Step 6: Final answer
    x = 585,580.69

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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.