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Finding the Fourth Proportional to 320,458.10, 480,734.97 and 118,038.78

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Solution

The fourth proportional to 320,458.10, 480,734.97 and 118,038.78 is: 177,075.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,458.10 : 480,734.97 = 118,038.78 : x
  2. Step 2: Convert to fraction form
    320,458.10/480,734.97 = 118,038.78/x
  3. Step 3: Cross multiply
    320,458.10x = 480,734.97 × 118,038.78
  4. Step 4: Simplify right side
    320,458.10x = 56,745,369,362.14
  5. Step 5: Solve for x
    x = 56,745,369,362.14/320,458.10
  6. Step 6: Final answer
    x = 177,075.78

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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.