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Finding the Fourth Proportional to 628,970.83, 867,751.82 and 356,881.15

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Solution

The fourth proportional to 628,970.83, 867,751.82 and 356,881.15 is: 492,366.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,970.83 : 867,751.82 = 356,881.15 : x
  2. Step 2: Convert to fraction form
    628,970.83/867,751.82 = 356,881.15/x
  3. Step 3: Cross multiply
    628,970.83x = 867,751.82 × 356,881.15
  4. Step 4: Simplify right side
    628,970.83x = 309,684,270,800.65
  5. Step 5: Solve for x
    x = 309,684,270,800.65/628,970.83
  6. Step 6: Final answer
    x = 492,366.66

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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.