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Finding the Fourth Proportional to 638,407.53, 958,695.95 and 426,536.93

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Solution

The fourth proportional to 638,407.53, 958,695.95 and 426,536.93 is: 640,530.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,407.53 : 958,695.95 = 426,536.93 : x
  2. Step 2: Convert to fraction form
    638,407.53/958,695.95 = 426,536.93/x
  3. Step 3: Cross multiply
    638,407.53x = 958,695.95 × 426,536.93
  4. Step 4: Simplify right side
    638,407.53x = 408,919,230,779.52
  5. Step 5: Solve for x
    x = 408,919,230,779.52/638,407.53
  6. Step 6: Final answer
    x = 640,530.09

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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.