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Finding the Fourth Proportional to 656,800.74, 906,386.57 and 354,994.74

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Solution

The fourth proportional to 656,800.74, 906,386.57 and 354,994.74 is: 489,893.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,800.74 : 906,386.57 = 354,994.74 : x
  2. Step 2: Convert to fraction form
    656,800.74/906,386.57 = 354,994.74/x
  3. Step 3: Cross multiply
    656,800.74x = 906,386.57 × 354,994.74
  4. Step 4: Simplify right side
    656,800.74x = 321,762,464,756.64
  5. Step 5: Solve for x
    x = 321,762,464,756.64/656,800.74
  6. Step 6: Final answer
    x = 489,893.58

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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.