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Finding the Fourth Proportional to 1,048.78, 1,570.10 and 554.02

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Solution

The fourth proportional to 1,048.78, 1,570.10 and 554.02 is: 829.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.78 : 1,570.10 = 554.02 : x
  2. Step 2: Convert to fraction form
    1,048.78/1,570.10 = 554.02/x
  3. Step 3: Cross multiply
    1,048.78x = 1,570.10 × 554.02
  4. Step 4: Simplify right side
    1,048.78x = 869,866.80
  5. Step 5: Solve for x
    x = 869,866.80/1,048.78
  6. Step 6: Final answer
    x = 829.41

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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.