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Finding the Fourth Proportional to 654,686.72, 903,882.75 and 448,300.44

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Solution

The fourth proportional to 654,686.72, 903,882.75 and 448,300.44 is: 618,938.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,686.72 : 903,882.75 = 448,300.44 : x
  2. Step 2: Convert to fraction form
    654,686.72/903,882.75 = 448,300.44/x
  3. Step 3: Cross multiply
    654,686.72x = 903,882.75 × 448,300.44
  4. Step 4: Simplify right side
    654,686.72x = 405,211,032,852.28
  5. Step 5: Solve for x
    x = 405,211,032,852.28/654,686.72
  6. Step 6: Final answer
    x = 618,938.83

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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.