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Finding the Fourth Proportional to 428,907.60, 591,883.20 and 237,916.80

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Solution

The fourth proportional to 428,907.60, 591,883.20 and 237,916.80 is: 328,320.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,907.60 : 591,883.20 = 237,916.80 : x
  2. Step 2: Convert to fraction form
    428,907.60/591,883.20 = 237,916.80/x
  3. Step 3: Cross multiply
    428,907.60x = 591,883.20 × 237,916.80
  4. Step 4: Simplify right side
    428,907.60x = 140,818,956,917.76
  5. Step 5: Solve for x
    x = 140,818,956,917.76/428,907.60
  6. Step 6: Final answer
    x = 328,320.03

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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.