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Finding the Fourth Proportional to 292,603.20, 438,904.80 and 105,620.80

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Solution

The fourth proportional to 292,603.20, 438,904.80 and 105,620.80 is: 158,431.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,603.20 : 438,904.80 = 105,620.80 : x
  2. Step 2: Convert to fraction form
    292,603.20/438,904.80 = 105,620.80/x
  3. Step 3: Cross multiply
    292,603.20x = 438,904.80 × 105,620.80
  4. Step 4: Simplify right side
    292,603.20x = 46,357,476,099.84
  5. Step 5: Solve for x
    x = 46,357,476,099.84/292,603.20
  6. Step 6: Final answer
    x = 158,431.20

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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.