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Finding the Fourth Proportional to 978,045.90, 1,467,068.85 and 918,996.90

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Solution

The fourth proportional to 978,045.90, 1,467,068.85 and 918,996.90 is: 1,378,495.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,045.90 : 1,467,068.85 = 918,996.90 : x
  2. Step 2: Convert to fraction form
    978,045.90/1,467,068.85 = 918,996.90/x
  3. Step 3: Cross multiply
    978,045.90x = 1,467,068.85 × 918,996.90
  4. Step 4: Simplify right side
    978,045.90x = 1,348,231,725,236.57
  5. Step 5: Solve for x
    x = 1,348,231,725,236.57/978,045.90
  6. Step 6: Final answer
    x = 1,378,495.35

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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.