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Finding the Fourth Proportional to 628,556.08, 867,390.70 and 342,070

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Solution

The fourth proportional to 628,556.08, 867,390.70 and 342,070 is: 472,047.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,556.08 : 867,390.70 = 342,070 : x
  2. Step 2: Convert to fraction form
    628,556.08/867,390.70 = 342,070/x
  3. Step 3: Cross multiply
    628,556.08x = 867,390.70 × 342,070
  4. Step 4: Simplify right side
    628,556.08x = 296,708,336,749
  5. Step 5: Solve for x
    x = 296,708,336,749/628,556.08
  6. Step 6: Final answer
    x = 472,047.52

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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.