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Finding the Fourth Proportional to 688,045.50, 949,642.50 and 397,669.40

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Solution

The fourth proportional to 688,045.50, 949,642.50 and 397,669.40 is: 548,864.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,045.50 : 949,642.50 = 397,669.40 : x
  2. Step 2: Convert to fraction form
    688,045.50/949,642.50 = 397,669.40/x
  3. Step 3: Cross multiply
    688,045.50x = 949,642.50 × 397,669.40
  4. Step 4: Simplify right side
    688,045.50x = 377,643,763,189.50
  5. Step 5: Solve for x
    x = 377,643,763,189.50/688,045.50
  6. Step 6: Final answer
    x = 548,864.52

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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.