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Finding the Fourth Proportional to 660,291.90, 911,224.89 and 369,916.02

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Solution

The fourth proportional to 660,291.90, 911,224.89 and 369,916.02 is: 510,496.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,291.90 : 911,224.89 = 369,916.02 : x
  2. Step 2: Convert to fraction form
    660,291.90/911,224.89 = 369,916.02/x
  3. Step 3: Cross multiply
    660,291.90x = 911,224.89 × 369,916.02
  4. Step 4: Simplify right side
    660,291.90x = 337,076,684,633.74
  5. Step 5: Solve for x
    x = 337,076,684,633.74/660,291.90
  6. Step 6: Final answer
    x = 510,496.47

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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.