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Finding the Fourth Proportional to 897.73, 1,339.04 and 870.40

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Solution

The fourth proportional to 897.73, 1,339.04 and 870.40 is: 1,298.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.73 : 1,339.04 = 870.40 : x
  2. Step 2: Convert to fraction form
    897.73/1,339.04 = 870.40/x
  3. Step 3: Cross multiply
    897.73x = 1,339.04 × 870.40
  4. Step 4: Simplify right side
    897.73x = 1,165,500.42
  5. Step 5: Solve for x
    x = 1,165,500.42/897.73
  6. Step 6: Final answer
    x = 1,298.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.