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Finding the Fourth Proportional to 508,724.21, 702,048.20 and 279,302.78

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Solution

The fourth proportional to 508,724.21, 702,048.20 and 279,302.78 is: 385,442.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,724.21 : 702,048.20 = 279,302.78 : x
  2. Step 2: Convert to fraction form
    508,724.21/702,048.20 = 279,302.78/x
  3. Step 3: Cross multiply
    508,724.21x = 702,048.20 × 279,302.78
  4. Step 4: Simplify right side
    508,724.21x = 196,084,009,047.24
  5. Step 5: Solve for x
    x = 196,084,009,047.24/508,724.21
  6. Step 6: Final answer
    x = 385,442.66

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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.