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Finding the Fourth Proportional to 505,370.88, 697,420.80 and 279,002.88

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Solution

The fourth proportional to 505,370.88, 697,420.80 and 279,002.88 is: 385,028.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,370.88 : 697,420.80 = 279,002.88 : x
  2. Step 2: Convert to fraction form
    505,370.88/697,420.80 = 279,002.88/x
  3. Step 3: Cross multiply
    505,370.88x = 697,420.80 × 279,002.88
  4. Step 4: Simplify right side
    505,370.88x = 194,582,411,771.90
  5. Step 5: Solve for x
    x = 194,582,411,771.90/505,370.88
  6. Step 6: Final answer
    x = 385,028.94

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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.