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Finding the Fourth Proportional to 897.45, 1,239.83 and 710.34

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Solution

The fourth proportional to 897.45, 1,239.83 and 710.34 is: 981.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.45 : 1,239.83 = 710.34 : x
  2. Step 2: Convert to fraction form
    897.45/1,239.83 = 710.34/x
  3. Step 3: Cross multiply
    897.45x = 1,239.83 × 710.34
  4. Step 4: Simplify right side
    897.45x = 880,697.29
  5. Step 5: Solve for x
    x = 880,697.29/897.45
  6. Step 6: Final answer
    x = 981.33

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1.5x scale

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.