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Finding the Fourth Proportional to 369,928.80, 555,476.40 and 212,464.80

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Solution

The fourth proportional to 369,928.80, 555,476.40 and 212,464.80 is: 319,032.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,928.80 : 555,476.40 = 212,464.80 : x
  2. Step 2: Convert to fraction form
    369,928.80/555,476.40 = 212,464.80/x
  3. Step 3: Cross multiply
    369,928.80x = 555,476.40 × 212,464.80
  4. Step 4: Simplify right side
    369,928.80x = 118,019,182,230.72
  5. Step 5: Solve for x
    x = 118,019,182,230.72/369,928.80
  6. Step 6: Final answer
    x = 319,032.15

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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.