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Finding the Fourth Proportional to 671,339.64, 926,340.30 and 384,807

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Solution

The fourth proportional to 671,339.64, 926,340.30 and 384,807 is: 530,971.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,339.64 : 926,340.30 = 384,807 : x
  2. Step 2: Convert to fraction form
    671,339.64/926,340.30 = 384,807/x
  3. Step 3: Cross multiply
    671,339.64x = 926,340.30 × 384,807
  4. Step 4: Simplify right side
    671,339.64x = 356,462,231,822.10
  5. Step 5: Solve for x
    x = 356,462,231,822.10/671,339.64
  6. Step 6: Final answer
    x = 530,971.52

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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.