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Finding the Fourth Proportional to 1,556.90, 2,334.75 and 530.90

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Solution

The fourth proportional to 1,556.90, 2,334.75 and 530.90 is: 796.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.90 : 2,334.75 = 530.90 : x
  2. Step 2: Convert to fraction form
    1,556.90/2,334.75 = 530.90/x
  3. Step 3: Cross multiply
    1,556.90x = 2,334.75 × 530.90
  4. Step 4: Simplify right side
    1,556.90x = 1,239,518.78
  5. Step 5: Solve for x
    x = 1,239,518.78/1,556.90
  6. Step 6: Final answer
    x = 796.15

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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.