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Finding the Fourth Proportional to 308,959.28, 426,143.94 and 283,547.72

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Solution

The fourth proportional to 308,959.28, 426,143.94 and 283,547.72 is: 391,094.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,959.28 : 426,143.94 = 283,547.72 : x
  2. Step 2: Convert to fraction form
    308,959.28/426,143.94 = 283,547.72/x
  3. Step 3: Cross multiply
    308,959.28x = 426,143.94 × 283,547.72
  4. Step 4: Simplify right side
    308,959.28x = 120,832,142,578.82
  5. Step 5: Solve for x
    x = 120,832,142,578.82/308,959.28
  6. Step 6: Final answer
    x = 391,094.07

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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.