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Finding the Fourth Proportional to 508,705.10, 702,021.78 and 279,283.64

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Solution

The fourth proportional to 508,705.10, 702,021.78 and 279,283.64 is: 385,416.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,705.10 : 702,021.78 = 279,283.64 : x
  2. Step 2: Convert to fraction form
    508,705.10/702,021.78 = 279,283.64/x
  3. Step 3: Cross multiply
    508,705.10x = 702,021.78 × 279,283.64
  4. Step 4: Simplify right side
    508,705.10x = 196,063,194,567.57
  5. Step 5: Solve for x
    x = 196,063,194,567.57/508,705.10
  6. Step 6: Final answer
    x = 385,416.22

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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.