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Finding the Fourth Proportional to 579,716.80, 870,007.20 and 299,089.60

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Solution

The fourth proportional to 579,716.80, 870,007.20 and 299,089.60 is: 448,857.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,716.80 : 870,007.20 = 299,089.60 : x
  2. Step 2: Convert to fraction form
    579,716.80/870,007.20 = 299,089.60/x
  3. Step 3: Cross multiply
    579,716.80x = 870,007.20 × 299,089.60
  4. Step 4: Simplify right side
    579,716.80x = 260,210,105,445.12
  5. Step 5: Solve for x
    x = 260,210,105,445.12/579,716.80
  6. Step 6: Final answer
    x = 448,857.28

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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.