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Finding the Fourth Proportional to 290,922.99, 436,384.28 and 91,258.80

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Solution

The fourth proportional to 290,922.99, 436,384.28 and 91,258.80 is: 136,888.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,922.99 : 436,384.28 = 91,258.80 : x
  2. Step 2: Convert to fraction form
    290,922.99/436,384.28 = 91,258.80/x
  3. Step 3: Cross multiply
    290,922.99x = 436,384.28 × 91,258.80
  4. Step 4: Simplify right side
    290,922.99x = 39,823,905,275.37
  5. Step 5: Solve for x
    x = 39,823,905,275.37/290,922.99
  6. Step 6: Final answer
    x = 136,888.13

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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.