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Finding the Fourth Proportional to 628,824.78, 867,750.98 and 342,345.87

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Solution

The fourth proportional to 628,824.78, 867,750.98 and 342,345.87 is: 472,422.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,824.78 : 867,750.98 = 342,345.87 : x
  2. Step 2: Convert to fraction form
    628,824.78/867,750.98 = 342,345.87/x
  3. Step 3: Cross multiply
    628,824.78x = 867,750.98 × 342,345.87
  4. Step 4: Simplify right side
    628,824.78x = 297,070,962,479.72
  5. Step 5: Solve for x
    x = 297,070,962,479.72/628,824.78
  6. Step 6: Final answer
    x = 472,422.48

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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.