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Finding the Fourth Proportional to 318,698.89, 439,787.76 and 175,430.95

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Solution

The fourth proportional to 318,698.89, 439,787.76 and 175,430.95 is: 242,085.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,698.89 : 439,787.76 = 175,430.95 : x
  2. Step 2: Convert to fraction form
    318,698.89/439,787.76 = 175,430.95/x
  3. Step 3: Cross multiply
    318,698.89x = 439,787.76 × 175,430.95
  4. Step 4: Simplify right side
    318,698.89x = 77,152,384,535.17
  5. Step 5: Solve for x
    x = 77,152,384,535.17/318,698.89
  6. Step 6: Final answer
    x = 242,085.51

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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.