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Finding the Fourth Proportional to 740.30, 1,021.55 and 474.27

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Solution

The fourth proportional to 740.30, 1,021.55 and 474.27 is: 654.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.30 : 1,021.55 = 474.27 : x
  2. Step 2: Convert to fraction form
    740.30/1,021.55 = 474.27/x
  3. Step 3: Cross multiply
    740.30x = 1,021.55 × 474.27
  4. Step 4: Simplify right side
    740.30x = 484,490.06
  5. Step 5: Solve for x
    x = 484,490.06/740.30
  6. Step 6: Final answer
    x = 654.45

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1.5x scale

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.