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Finding the Fourth Proportional to 509,130.48, 702,612.68 and 279,710.60

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Solution

The fourth proportional to 509,130.48, 702,612.68 and 279,710.60 is: 386,007.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,130.48 : 702,612.68 = 279,710.60 : x
  2. Step 2: Convert to fraction form
    509,130.48/702,612.68 = 279,710.60/x
  3. Step 3: Cross multiply
    509,130.48x = 702,612.68 × 279,710.60
  4. Step 4: Simplify right side
    509,130.48x = 196,528,214,290.41
  5. Step 5: Solve for x
    x = 196,528,214,290.41/509,130.48
  6. Step 6: Final answer
    x = 386,007.56

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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.