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Finding the Fourth Proportional to 501,643.20, 692,240 and 275,270.72

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Solution

The fourth proportional to 501,643.20, 692,240 and 275,270.72 is: 379,858.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,643.20 : 692,240 = 275,270.72 : x
  2. Step 2: Convert to fraction form
    501,643.20/692,240 = 275,270.72/x
  3. Step 3: Cross multiply
    501,643.20x = 692,240 × 275,270.72
  4. Step 4: Simplify right side
    501,643.20x = 190,553,403,212.80
  5. Step 5: Solve for x
    x = 190,553,403,212.80/501,643.20
  6. Step 6: Final answer
    x = 379,858.44

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1.5x scale

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.