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Finding the Fourth Proportional to 423,865.88, 635,672 and 139,503.94

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Solution

The fourth proportional to 423,865.88, 635,672 and 139,503.94 is: 209,214.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,865.88 : 635,672 = 139,503.94 : x
  2. Step 2: Convert to fraction form
    423,865.88/635,672 = 139,503.94/x
  3. Step 3: Cross multiply
    423,865.88x = 635,672 × 139,503.94
  4. Step 4: Simplify right side
    423,865.88x = 88,678,748,547.68
  5. Step 5: Solve for x
    x = 88,678,748,547.68/423,865.88
  6. Step 6: Final answer
    x = 209,214.17

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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.