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Finding the Fourth Proportional to 987,412.80, 1,480,812 and 356,244.80

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Solution

The fourth proportional to 987,412.80, 1,480,812 and 356,244.80 is: 534,256.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,412.80 : 1,480,812 = 356,244.80 : x
  2. Step 2: Convert to fraction form
    987,412.80/1,480,812 = 356,244.80/x
  3. Step 3: Cross multiply
    987,412.80x = 1,480,812 × 356,244.80
  4. Step 4: Simplify right side
    987,412.80x = 527,531,574,777.60
  5. Step 5: Solve for x
    x = 527,531,574,777.60/987,412.80
  6. Step 6: Final answer
    x = 534,256.37

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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.