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Finding the Fourth Proportional to 603.86, 831.06 and 530.04

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Solution

The fourth proportional to 603.86, 831.06 and 530.04 is: 729.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.86 : 831.06 = 530.04 : x
  2. Step 2: Convert to fraction form
    603.86/831.06 = 530.04/x
  3. Step 3: Cross multiply
    603.86x = 831.06 × 530.04
  4. Step 4: Simplify right side
    603.86x = 440,498.16
  5. Step 5: Solve for x
    x = 440,498.16/603.86
  6. Step 6: Final answer
    x = 729.48

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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.