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Finding the Fourth Proportional to 628,870.32, 867,646.44 and 383,907.60

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Solution

The fourth proportional to 628,870.32, 867,646.44 and 383,907.60 is: 529,673.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,870.32 : 867,646.44 = 383,907.60 : x
  2. Step 2: Convert to fraction form
    628,870.32/867,646.44 = 383,907.60/x
  3. Step 3: Cross multiply
    628,870.32x = 867,646.44 × 383,907.60
  4. Step 4: Simplify right side
    628,870.32x = 333,096,062,428.94
  5. Step 5: Solve for x
    x = 333,096,062,428.94/628,870.32
  6. Step 6: Final answer
    x = 529,673.69

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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.