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Finding the Fourth Proportional to 509,172.84, 702,655.59 and 279,725.19

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Solution

The fourth proportional to 509,172.84, 702,655.59 and 279,725.19 is: 386,019.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,172.84 : 702,655.59 = 279,725.19 : x
  2. Step 2: Convert to fraction form
    509,172.84/702,655.59 = 279,725.19/x
  3. Step 3: Cross multiply
    509,172.84x = 702,655.59 × 279,725.19
  4. Step 4: Simplify right side
    509,172.84x = 196,550,468,417.31
  5. Step 5: Solve for x
    x = 196,550,468,417.31/509,172.84
  6. Step 6: Final answer
    x = 386,019.15

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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.