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Finding the Fourth Proportional to 426,143.08, 638,605.50 and 312,935.32

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Solution

The fourth proportional to 426,143.08, 638,605.50 and 312,935.32 is: 468,955.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,143.08 : 638,605.50 = 312,935.32 : x
  2. Step 2: Convert to fraction form
    426,143.08/638,605.50 = 312,935.32/x
  3. Step 3: Cross multiply
    426,143.08x = 638,605.50 × 312,935.32
  4. Step 4: Simplify right side
    426,143.08x = 199,842,216,496.26
  5. Step 5: Solve for x
    x = 199,842,216,496.26/426,143.08
  6. Step 6: Final answer
    x = 468,955.68

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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.