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Finding the Fourth Proportional to 579,712.80, 870,001.20 and 299,085.60

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Solution

The fourth proportional to 579,712.80, 870,001.20 and 299,085.60 is: 448,851.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,712.80 : 870,001.20 = 299,085.60 : x
  2. Step 2: Convert to fraction form
    579,712.80/870,001.20 = 299,085.60/x
  3. Step 3: Cross multiply
    579,712.80x = 870,001.20 × 299,085.60
  4. Step 4: Simplify right side
    579,712.80x = 260,204,830,902.72
  5. Step 5: Solve for x
    x = 260,204,830,902.72/579,712.80
  6. Step 6: Final answer
    x = 448,851.28

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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.