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Finding the Fourth Proportional to 256,616.13, 384,899.45 and 79,075.47

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Solution

The fourth proportional to 256,616.13, 384,899.45 and 79,075.47 is: 118,605.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,616.13 : 384,899.45 = 79,075.47 : x
  2. Step 2: Convert to fraction form
    256,616.13/384,899.45 = 79,075.47/x
  3. Step 3: Cross multiply
    256,616.13x = 384,899.45 × 79,075.47
  4. Step 4: Simplify right side
    256,616.13x = 30,436,104,516.11
  5. Step 5: Solve for x
    x = 30,436,104,516.11/256,616.13
  6. Step 6: Final answer
    x = 118,605.58

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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.