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Finding the Fourth Proportional to 559,395.36, 771,985.44 and 317,671.20

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Solution

The fourth proportional to 559,395.36, 771,985.44 and 317,671.20 is: 438,397.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,395.36 : 771,985.44 = 317,671.20 : x
  2. Step 2: Convert to fraction form
    559,395.36/771,985.44 = 317,671.20/x
  3. Step 3: Cross multiply
    559,395.36x = 771,985.44 × 317,671.20
  4. Step 4: Simplify right side
    559,395.36x = 245,237,541,107.33
  5. Step 5: Solve for x
    x = 245,237,541,107.33/559,395.36
  6. Step 6: Final answer
    x = 438,397.52

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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.