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Finding the Fourth Proportional to 348,708.88, 479,708.16 and 305,493.76

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Solution

The fourth proportional to 348,708.88, 479,708.16 and 305,493.76 is: 420,258.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,708.88 : 479,708.16 = 305,493.76 : x
  2. Step 2: Convert to fraction form
    348,708.88/479,708.16 = 305,493.76/x
  3. Step 3: Cross multiply
    348,708.88x = 479,708.16 × 305,493.76
  4. Step 4: Simplify right side
    348,708.88x = 146,547,849,501.08
  5. Step 5: Solve for x
    x = 146,547,849,501.08/348,708.88
  6. Step 6: Final answer
    x = 420,258.44

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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.