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Finding the Fourth Proportional to 656,817, 906,407.22 and 355,011

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Solution

The fourth proportional to 656,817, 906,407.22 and 355,011 is: 489,915.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,817 : 906,407.22 = 355,011 : x
  2. Step 2: Convert to fraction form
    656,817/906,407.22 = 355,011/x
  3. Step 3: Cross multiply
    656,817x = 906,407.22 × 355,011
  4. Step 4: Simplify right side
    656,817x = 321,784,533,579.42
  5. Step 5: Solve for x
    x = 321,784,533,579.42/656,817
  6. Step 6: Final answer
    x = 489,915.05

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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.