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Finding the Fourth Proportional to 402,603.40, 603,905.10 and 262,635.40

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Solution

The fourth proportional to 402,603.40, 603,905.10 and 262,635.40 is: 393,953.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,603.40 : 603,905.10 = 262,635.40 : x
  2. Step 2: Convert to fraction form
    402,603.40/603,905.10 = 262,635.40/x
  3. Step 3: Cross multiply
    402,603.40x = 603,905.10 × 262,635.40
  4. Step 4: Simplify right side
    402,603.40x = 158,606,857,500.54
  5. Step 5: Solve for x
    x = 158,606,857,500.54/402,603.40
  6. Step 6: Final answer
    x = 393,953.10

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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.