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Finding the Fourth Proportional to 423,653.84, 635,559 and 139,360.40

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Solution

The fourth proportional to 423,653.84, 635,559 and 139,360.40 is: 209,066.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,653.84 : 635,559 = 139,360.40 : x
  2. Step 2: Convert to fraction form
    423,653.84/635,559 = 139,360.40/x
  3. Step 3: Cross multiply
    423,653.84x = 635,559 × 139,360.40
  4. Step 4: Simplify right side
    423,653.84x = 88,571,756,463.60
  5. Step 5: Solve for x
    x = 88,571,756,463.60/423,653.84
  6. Step 6: Final answer
    x = 209,066.34

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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.