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Finding the Fourth Proportional to 656,851.64, 906,455.06 and 355,045.64

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Solution

The fourth proportional to 656,851.64, 906,455.06 and 355,045.64 is: 489,962.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,851.64 : 906,455.06 = 355,045.64 : x
  2. Step 2: Convert to fraction form
    656,851.64/906,455.06 = 355,045.64/x
  3. Step 3: Cross multiply
    656,851.64x = 906,455.06 × 355,045.64
  4. Step 4: Simplify right side
    656,851.64x = 321,832,916,908.94
  5. Step 5: Solve for x
    x = 321,832,916,908.94/656,851.64
  6. Step 6: Final answer
    x = 489,962.87

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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.