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Finding the Fourth Proportional to 628,608.22, 867,479.36 and 342,130.39

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Solution

The fourth proportional to 628,608.22, 867,479.36 and 342,130.39 is: 472,139.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,608.22 : 867,479.36 = 342,130.39 : x
  2. Step 2: Convert to fraction form
    628,608.22/867,479.36 = 342,130.39/x
  3. Step 3: Cross multiply
    628,608.22x = 867,479.36 × 342,130.39
  4. Step 4: Simplify right side
    628,608.22x = 296,791,047,874.40
  5. Step 5: Solve for x
    x = 296,791,047,874.40/628,608.22
  6. Step 6: Final answer
    x = 472,139.94

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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.