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Finding the Fourth Proportional to 867,968.80, 1,301,953.20 and 728,000.80

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Solution

The fourth proportional to 867,968.80, 1,301,953.20 and 728,000.80 is: 1,092,001.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,968.80 : 1,301,953.20 = 728,000.80 : x
  2. Step 2: Convert to fraction form
    867,968.80/1,301,953.20 = 728,000.80/x
  3. Step 3: Cross multiply
    867,968.80x = 1,301,953.20 × 728,000.80
  4. Step 4: Simplify right side
    867,968.80x = 947,822,971,162.56
  5. Step 5: Solve for x
    x = 947,822,971,162.56/867,968.80
  6. Step 6: Final answer
    x = 1,092,001.20

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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.