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Finding the Fourth Proportional to 1,070.48, 1,478.21 and 1,035.62

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Solution

The fourth proportional to 1,070.48, 1,478.21 and 1,035.62 is: 1,430.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.48 : 1,478.21 = 1,035.62 : x
  2. Step 2: Convert to fraction form
    1,070.48/1,478.21 = 1,035.62/x
  3. Step 3: Cross multiply
    1,070.48x = 1,478.21 × 1,035.62
  4. Step 4: Simplify right side
    1,070.48x = 1,530,851.27
  5. Step 5: Solve for x
    x = 1,530,851.27/1,070.48
  6. Step 6: Final answer
    x = 1,430.07

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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.