Home / 309,899.61-427,913.55-252,547.38

Finding the Fourth Proportional to 309,899.61, 427,913.55 and 252,547.38

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Solution

The fourth proportional to 309,899.61, 427,913.55 and 252,547.38 is: 348,720.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,899.61 : 427,913.55 = 252,547.38 : x
  2. Step 2: Convert to fraction form
    309,899.61/427,913.55 = 252,547.38/x
  3. Step 3: Cross multiply
    309,899.61x = 427,913.55 × 252,547.38
  4. Step 4: Simplify right side
    309,899.61x = 108,068,445,919.00
  5. Step 5: Solve for x
    x = 108,068,445,919.00/309,899.61
  6. Step 6: Final answer
    x = 348,720.82

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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.