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Finding the Fourth Proportional to 611,785.40, 844,240.40 and 339,870.40

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Solution

The fourth proportional to 611,785.40, 844,240.40 and 339,870.40 is: 469,008.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,785.40 : 844,240.40 = 339,870.40 : x
  2. Step 2: Convert to fraction form
    611,785.40/844,240.40 = 339,870.40/x
  3. Step 3: Cross multiply
    611,785.40x = 844,240.40 × 339,870.40
  4. Step 4: Simplify right side
    611,785.40x = 286,932,322,444.16
  5. Step 5: Solve for x
    x = 286,932,322,444.16/611,785.40
  6. Step 6: Final answer
    x = 469,008.12

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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.