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Finding the Fourth Proportional to 426,406.69, 638,590.34 and 245,945.06

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Solution

The fourth proportional to 426,406.69, 638,590.34 and 245,945.06 is: 368,329.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,406.69 : 638,590.34 = 245,945.06 : x
  2. Step 2: Convert to fraction form
    426,406.69/638,590.34 = 245,945.06/x
  3. Step 3: Cross multiply
    426,406.69x = 638,590.34 × 245,945.06
  4. Step 4: Simplify right side
    426,406.69x = 157,058,139,303.35
  5. Step 5: Solve for x
    x = 157,058,139,303.35/426,406.69
  6. Step 6: Final answer
    x = 368,329.44

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1.5x scale

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.