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Finding the Fourth Proportional to 613,947.40, 921,019.51 and 259,013.70

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Solution

The fourth proportional to 613,947.40, 921,019.51 and 259,013.70 is: 388,562.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,947.40 : 921,019.51 = 259,013.70 : x
  2. Step 2: Convert to fraction form
    613,947.40/921,019.51 = 259,013.70/x
  3. Step 3: Cross multiply
    613,947.40x = 921,019.51 × 259,013.70
  4. Step 4: Simplify right side
    613,947.40x = 238,556,671,381.05
  5. Step 5: Solve for x
    x = 238,556,671,381.05/613,947.40
  6. Step 6: Final answer
    x = 388,562.07

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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.