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Finding the Fourth Proportional to 1,048.79, 1,573.15 and 355.45

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Solution

The fourth proportional to 1,048.79, 1,573.15 and 355.45 is: 533.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.79 : 1,573.15 = 355.45 : x
  2. Step 2: Convert to fraction form
    1,048.79/1,573.15 = 355.45/x
  3. Step 3: Cross multiply
    1,048.79x = 1,573.15 × 355.45
  4. Step 4: Simplify right side
    1,048.79x = 559,176.17
  5. Step 5: Solve for x
    x = 559,176.17/1,048.79
  6. Step 6: Final answer
    x = 533.16

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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.