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Finding the Fourth Proportional to 1,048.32, 1,570.40 and 553.98

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Solution

The fourth proportional to 1,048.32, 1,570.40 and 553.98 is: 829.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.32 : 1,570.40 = 553.98 : x
  2. Step 2: Convert to fraction form
    1,048.32/1,570.40 = 553.98/x
  3. Step 3: Cross multiply
    1,048.32x = 1,570.40 × 553.98
  4. Step 4: Simplify right side
    1,048.32x = 869,970.19
  5. Step 5: Solve for x
    x = 869,970.19/1,048.32
  6. Step 6: Final answer
    x = 829.87

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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.