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Finding the Fourth Proportional to 284,620.47, 392,776.88 and 155,561.01

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Solution

The fourth proportional to 284,620.47, 392,776.88 and 155,561.01 is: 214,674.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,620.47 : 392,776.88 = 155,561.01 : x
  2. Step 2: Convert to fraction form
    284,620.47/392,776.88 = 155,561.01/x
  3. Step 3: Cross multiply
    284,620.47x = 392,776.88 × 155,561.01
  4. Step 4: Simplify right side
    284,620.47x = 61,100,767,379.64
  5. Step 5: Solve for x
    x = 61,100,767,379.64/284,620.47
  6. Step 6: Final answer
    x = 214,674.54

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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.