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Finding the Fourth Proportional to 656,808.79, 906,395.67 and 355,002.79

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Solution

The fourth proportional to 656,808.79, 906,395.67 and 355,002.79 is: 489,903.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,808.79 : 906,395.67 = 355,002.79 : x
  2. Step 2: Convert to fraction form
    656,808.79/906,395.67 = 355,002.79/x
  3. Step 3: Cross multiply
    656,808.79x = 906,395.67 × 355,002.79
  4. Step 4: Simplify right side
    656,808.79x = 321,772,991,693.92
  5. Step 5: Solve for x
    x = 321,772,991,693.92/656,808.79
  6. Step 6: Final answer
    x = 489,903.60

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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.