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Finding the Fourth Proportional to 1,035.42, 1,430.34 and 740.16

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Solution

The fourth proportional to 1,035.42, 1,430.34 and 740.16 is: 1,022.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.42 : 1,430.34 = 740.16 : x
  2. Step 2: Convert to fraction form
    1,035.42/1,430.34 = 740.16/x
  3. Step 3: Cross multiply
    1,035.42x = 1,430.34 × 740.16
  4. Step 4: Simplify right side
    1,035.42x = 1,058,680.45
  5. Step 5: Solve for x
    x = 1,058,680.45/1,035.42
  6. Step 6: Final answer
    x = 1,022.46

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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.