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Finding the Fourth Proportional to 604.15, 904.20 and 555.55

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Solution

The fourth proportional to 604.15, 904.20 and 555.55 is: 831.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.15 : 904.20 = 555.55 : x
  2. Step 2: Convert to fraction form
    604.15/904.20 = 555.55/x
  3. Step 3: Cross multiply
    604.15x = 904.20 × 555.55
  4. Step 4: Simplify right side
    604.15x = 502,328.31
  5. Step 5: Solve for x
    x = 502,328.31/604.15
  6. Step 6: Final answer
    x = 831.46

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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.