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Finding the Fourth Proportional to 401,392.40, 553,947.12 and 265,187.42

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Solution

The fourth proportional to 401,392.40, 553,947.12 and 265,187.42 is: 365,975.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,392.40 : 553,947.12 = 265,187.42 : x
  2. Step 2: Convert to fraction form
    401,392.40/553,947.12 = 265,187.42/x
  3. Step 3: Cross multiply
    401,392.40x = 553,947.12 × 265,187.42
  4. Step 4: Simplify right side
    401,392.40x = 146,899,807,569.23
  5. Step 5: Solve for x
    x = 146,899,807,569.23/401,392.40
  6. Step 6: Final answer
    x = 365,975.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.