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Finding the Fourth Proportional to 256,616.31, 384,899.73 and 79,075.65

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Solution

The fourth proportional to 256,616.31, 384,899.73 and 79,075.65 is: 118,605.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,616.31 : 384,899.73 = 79,075.65 : x
  2. Step 2: Convert to fraction form
    256,616.31/384,899.73 = 79,075.65/x
  3. Step 3: Cross multiply
    256,616.31x = 384,899.73 × 79,075.65
  4. Step 4: Simplify right side
    256,616.31x = 30,436,196,038.04
  5. Step 5: Solve for x
    x = 30,436,196,038.04/256,616.31
  6. Step 6: Final answer
    x = 118,605.85

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1.5x scale

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.