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Finding the Fourth Proportional to 398,810.88, 598,302.72 and 118,320

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Solution

The fourth proportional to 398,810.88, 598,302.72 and 118,320 is: 177,505.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,810.88 : 598,302.72 = 118,320 : x
  2. Step 2: Convert to fraction form
    398,810.88/598,302.72 = 118,320/x
  3. Step 3: Cross multiply
    398,810.88x = 598,302.72 × 118,320
  4. Step 4: Simplify right side
    398,810.88x = 70,791,177,830.40
  5. Step 5: Solve for x
    x = 70,791,177,830.40/398,810.88
  6. Step 6: Final answer
    x = 177,505.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.