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Finding the Fourth Proportional to 354,859.84, 488,463.58 and 309,457.72

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Solution

The fourth proportional to 354,859.84, 488,463.58 and 309,457.72 is: 425,967.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,859.84 : 488,463.58 = 309,457.72 : x
  2. Step 2: Convert to fraction form
    354,859.84/488,463.58 = 309,457.72/x
  3. Step 3: Cross multiply
    354,859.84x = 488,463.58 × 309,457.72
  4. Step 4: Simplify right side
    354,859.84x = 151,158,825,769.84
  5. Step 5: Solve for x
    x = 151,158,825,769.84/354,859.84
  6. Step 6: Final answer
    x = 425,967.69

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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.