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Finding the Fourth Proportional to 342,428.20, 513,642.30 and 155,804.20

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Solution

The fourth proportional to 342,428.20, 513,642.30 and 155,804.20 is: 233,706.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,428.20 : 513,642.30 = 155,804.20 : x
  2. Step 2: Convert to fraction form
    342,428.20/513,642.30 = 155,804.20/x
  3. Step 3: Cross multiply
    342,428.20x = 513,642.30 × 155,804.20
  4. Step 4: Simplify right side
    342,428.20x = 80,027,627,637.66
  5. Step 5: Solve for x
    x = 80,027,627,637.66/342,428.20
  6. Step 6: Final answer
    x = 233,706.30

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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.