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Finding the Fourth Proportional to 487,622.40, 731,433.60 and 404,678.40

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Solution

The fourth proportional to 487,622.40, 731,433.60 and 404,678.40 is: 607,017.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,622.40 : 731,433.60 = 404,678.40 : x
  2. Step 2: Convert to fraction form
    487,622.40/731,433.60 = 404,678.40/x
  3. Step 3: Cross multiply
    487,622.40x = 731,433.60 × 404,678.40
  4. Step 4: Simplify right side
    487,622.40x = 295,995,378,954.24
  5. Step 5: Solve for x
    x = 295,995,378,954.24/487,622.40
  6. Step 6: Final answer
    x = 607,017.60

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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.