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Finding the Fourth Proportional to 418,054.40, 626,390.40 and 355,846.40

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Solution

The fourth proportional to 418,054.40, 626,390.40 and 355,846.40 is: 533,181.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,054.40 : 626,390.40 = 355,846.40 : x
  2. Step 2: Convert to fraction form
    418,054.40/626,390.40 = 355,846.40/x
  3. Step 3: Cross multiply
    418,054.40x = 626,390.40 × 355,846.40
  4. Step 4: Simplify right side
    418,054.40x = 222,898,768,834.56
  5. Step 5: Solve for x
    x = 222,898,768,834.56/418,054.40
  6. Step 6: Final answer
    x = 533,181.25

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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.