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Finding the Fourth Proportional to 307,780.30, 460,620.15 and 257,916.70

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Solution

The fourth proportional to 307,780.30, 460,620.15 and 257,916.70 is: 385,994.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,780.30 : 460,620.15 = 257,916.70 : x
  2. Step 2: Convert to fraction form
    307,780.30/460,620.15 = 257,916.70/x
  3. Step 3: Cross multiply
    307,780.30x = 460,620.15 × 257,916.70
  4. Step 4: Simplify right side
    307,780.30x = 118,801,629,041.51
  5. Step 5: Solve for x
    x = 118,801,629,041.51/307,780.30
  6. Step 6: Final answer
    x = 385,994.91

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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.