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Finding the Fourth Proportional to 279,068.16, 418,602.24 and 79,409.28

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Solution

The fourth proportional to 279,068.16, 418,602.24 and 79,409.28 is: 119,113.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,068.16 : 418,602.24 = 79,409.28 : x
  2. Step 2: Convert to fraction form
    279,068.16/418,602.24 = 79,409.28/x
  3. Step 3: Cross multiply
    279,068.16x = 418,602.24 × 79,409.28
  4. Step 4: Simplify right side
    279,068.16x = 33,240,902,484.79
  5. Step 5: Solve for x
    x = 33,240,902,484.79/279,068.16
  6. Step 6: Final answer
    x = 119,113.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.