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Finding the Fourth Proportional to 621,443.94, 857,585.44 and 349,510.74

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Solution

The fourth proportional to 621,443.94, 857,585.44 and 349,510.74 is: 482,320.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,443.94 : 857,585.44 = 349,510.74 : x
  2. Step 2: Convert to fraction form
    621,443.94/857,585.44 = 349,510.74/x
  3. Step 3: Cross multiply
    621,443.94x = 857,585.44 × 349,510.74
  4. Step 4: Simplify right side
    621,443.94x = 299,735,321,747.63
  5. Step 5: Solve for x
    x = 299,735,321,747.63/621,443.94
  6. Step 6: Final answer
    x = 482,320.77

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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.