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Finding the Fourth Proportional to 292,987.40, 438,314.70 and 253,977.80

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Solution

The fourth proportional to 292,987.40, 438,314.70 and 253,977.80 is: 379,955.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,987.40 : 438,314.70 = 253,977.80 : x
  2. Step 2: Convert to fraction form
    292,987.40/438,314.70 = 253,977.80/x
  3. Step 3: Cross multiply
    292,987.40x = 438,314.70 × 253,977.80
  4. Step 4: Simplify right side
    292,987.40x = 111,322,203,213.66
  5. Step 5: Solve for x
    x = 111,322,203,213.66/292,987.40
  6. Step 6: Final answer
    x = 379,955.60

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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.