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Finding the Fourth Proportional to 648,685.99, 895,181.31 and 354,335.95

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Solution

The fourth proportional to 648,685.99, 895,181.31 and 354,335.95 is: 488,980.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,685.99 : 895,181.31 = 354,335.95 : x
  2. Step 2: Convert to fraction form
    648,685.99/895,181.31 = 354,335.95/x
  3. Step 3: Cross multiply
    648,685.99x = 895,181.31 × 354,335.95
  4. Step 4: Simplify right side
    648,685.99x = 317,194,915,425.19
  5. Step 5: Solve for x
    x = 317,194,915,425.19/648,685.99
  6. Step 6: Final answer
    x = 488,980.68

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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.