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Finding the Fourth Proportional to 3,398,978.45, 4,689,533.70 and 1,928,643.77

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Solution

The fourth proportional to 3,398,978.45, 4,689,533.70 and 1,928,643.77 is: 2,660,928.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,398,978.45 : 4,689,533.70 = 1,928,643.77 : x
  2. Step 2: Convert to fraction form
    3,398,978.45/4,689,533.70 = 1,928,643.77/x
  3. Step 3: Cross multiply
    3,398,978.45x = 4,689,533.70 × 1,928,643.77
  4. Step 4: Simplify right side
    3,398,978.45x = 9,044,439,931,262.38
  5. Step 5: Solve for x
    x = 9,044,439,931,262.38/3,398,978.45
  6. Step 6: Final answer
    x = 2,660,928.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.