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Finding the Fourth Proportional to 1,078.04, 1,615.98 and 529.40

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Solution

The fourth proportional to 1,078.04, 1,615.98 and 529.40 is: 793.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.04 : 1,615.98 = 529.40 : x
  2. Step 2: Convert to fraction form
    1,078.04/1,615.98 = 529.40/x
  3. Step 3: Cross multiply
    1,078.04x = 1,615.98 × 529.40
  4. Step 4: Simplify right side
    1,078.04x = 855,499.81
  5. Step 5: Solve for x
    x = 855,499.81/1,078.04
  6. Step 6: Final answer
    x = 793.57

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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.