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Finding the Fourth Proportional to 897.54, 1,239.62 and 613.48

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Solution

The fourth proportional to 897.54, 1,239.62 and 613.48 is: 847.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.54 : 1,239.62 = 613.48 : x
  2. Step 2: Convert to fraction form
    897.54/1,239.62 = 613.48/x
  3. Step 3: Cross multiply
    897.54x = 1,239.62 × 613.48
  4. Step 4: Simplify right side
    897.54x = 760,482.08
  5. Step 5: Solve for x
    x = 760,482.08/897.54
  6. Step 6: Final answer
    x = 847.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.