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Finding the Fourth Proportional to 556,248.28, 767,650.78 and 311,260.54

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Solution

The fourth proportional to 556,248.28, 767,650.78 and 311,260.54 is: 429,555.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,248.28 : 767,650.78 = 311,260.54 : x
  2. Step 2: Convert to fraction form
    556,248.28/767,650.78 = 311,260.54/x
  3. Step 3: Cross multiply
    556,248.28x = 767,650.78 × 311,260.54
  4. Step 4: Simplify right side
    556,248.28x = 238,939,396,314.22
  5. Step 5: Solve for x
    x = 238,939,396,314.22/556,248.28
  6. Step 6: Final answer
    x = 429,555.30

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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.