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Finding the Fourth Proportional to 354,547.20, 531,043.20 and 307,891.20

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Solution

The fourth proportional to 354,547.20, 531,043.20 and 307,891.20 is: 461,161.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,547.20 : 531,043.20 = 307,891.20 : x
  2. Step 2: Convert to fraction form
    354,547.20/531,043.20 = 307,891.20/x
  3. Step 3: Cross multiply
    354,547.20x = 531,043.20 × 307,891.20
  4. Step 4: Simplify right side
    354,547.20x = 163,503,528,099.84
  5. Step 5: Solve for x
    x = 163,503,528,099.84/354,547.20
  6. Step 6: Final answer
    x = 461,161.53

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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.