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Finding the Fourth Proportional to 487.30, 673.42 and 433.30

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Solution

The fourth proportional to 487.30, 673.42 and 433.30 is: 598.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.30 : 673.42 = 433.30 : x
  2. Step 2: Convert to fraction form
    487.30/673.42 = 433.30/x
  3. Step 3: Cross multiply
    487.30x = 673.42 × 433.30
  4. Step 4: Simplify right side
    487.30x = 291,792.89
  5. Step 5: Solve for x
    x = 291,792.89/487.30
  6. Step 6: Final answer
    x = 598.80

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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.