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Finding the Fourth Proportional to 978,085.40, 1,467,128.10 and 846,865.40

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Solution

The fourth proportional to 978,085.40, 1,467,128.10 and 846,865.40 is: 1,270,298.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,085.40 : 1,467,128.10 = 846,865.40 : x
  2. Step 2: Convert to fraction form
    978,085.40/1,467,128.10 = 846,865.40/x
  3. Step 3: Cross multiply
    978,085.40x = 1,467,128.10 × 846,865.40
  4. Step 4: Simplify right side
    978,085.40x = 1,242,460,025,257.74
  5. Step 5: Solve for x
    x = 1,242,460,025,257.74/978,085.40
  6. Step 6: Final answer
    x = 1,270,298.10

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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.