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Finding the Fourth Proportional to 656,817.76, 906,408.51 and 355,011.76

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Solution

The fourth proportional to 656,817.76, 906,408.51 and 355,011.76 is: 489,916.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,817.76 : 906,408.51 = 355,011.76 : x
  2. Step 2: Convert to fraction form
    656,817.76/906,408.51 = 355,011.76/x
  3. Step 3: Cross multiply
    656,817.76x = 906,408.51 × 355,011.76
  4. Step 4: Simplify right side
    656,817.76x = 321,785,675,882.04
  5. Step 5: Solve for x
    x = 321,785,675,882.04/656,817.76
  6. Step 6: Final answer
    x = 489,916.23

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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.