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Finding the Fourth Proportional to 492,264.37, 679,386.63 and 288,393.07

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Solution

The fourth proportional to 492,264.37, 679,386.63 and 288,393.07 is: 398,018.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,264.37 : 679,386.63 = 288,393.07 : x
  2. Step 2: Convert to fraction form
    492,264.37/679,386.63 = 288,393.07/x
  3. Step 3: Cross multiply
    492,264.37x = 679,386.63 × 288,393.07
  4. Step 4: Simplify right side
    492,264.37x = 195,930,395,942.65
  5. Step 5: Solve for x
    x = 195,930,395,942.65/492,264.37
  6. Step 6: Final answer
    x = 398,018.64

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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.