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Finding the Fourth Proportional to 354,344.61, 488,598.30 and 289,612.95

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Solution

The fourth proportional to 354,344.61, 488,598.30 and 289,612.95 is: 399,341.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,344.61 : 488,598.30 = 289,612.95 : x
  2. Step 2: Convert to fraction form
    354,344.61/488,598.30 = 289,612.95/x
  3. Step 3: Cross multiply
    354,344.61x = 488,598.30 × 289,612.95
  4. Step 4: Simplify right side
    354,344.61x = 141,504,395,027.99
  5. Step 5: Solve for x
    x = 141,504,395,027.99/354,344.61
  6. Step 6: Final answer
    x = 399,341.18

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1.5x scale

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.