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Finding the Fourth Proportional to 423,655.84, 635,562 and 139,362.40

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Solution

The fourth proportional to 423,655.84, 635,562 and 139,362.40 is: 209,069.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,655.84 : 635,562 = 139,362.40 : x
  2. Step 2: Convert to fraction form
    423,655.84/635,562 = 139,362.40/x
  3. Step 3: Cross multiply
    423,655.84x = 635,562 × 139,362.40
  4. Step 4: Simplify right side
    423,655.84x = 88,573,445,668.80
  5. Step 5: Solve for x
    x = 88,573,445,668.80/423,655.84
  6. Step 6: Final answer
    x = 209,069.34

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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.