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Finding the Fourth Proportional to 340,870.40, 511,305.60 and 257,926.40

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Solution

The fourth proportional to 340,870.40, 511,305.60 and 257,926.40 is: 386,889.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,870.40 : 511,305.60 = 257,926.40 : x
  2. Step 2: Convert to fraction form
    340,870.40/511,305.60 = 257,926.40/x
  3. Step 3: Cross multiply
    340,870.40x = 511,305.60 × 257,926.40
  4. Step 4: Simplify right side
    340,870.40x = 131,879,212,707.84
  5. Step 5: Solve for x
    x = 131,879,212,707.84/340,870.40
  6. Step 6: Final answer
    x = 386,889.60

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1.5x scale

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.