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Finding the Fourth Proportional to 346,420.80, 477,640.80 and 265,939.20

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Solution

The fourth proportional to 346,420.80, 477,640.80 and 265,939.20 is: 366,673.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,420.80 : 477,640.80 = 265,939.20 : x
  2. Step 2: Convert to fraction form
    346,420.80/477,640.80 = 265,939.20/x
  3. Step 3: Cross multiply
    346,420.80x = 477,640.80 × 265,939.20
  4. Step 4: Simplify right side
    346,420.80x = 127,023,412,239.36
  5. Step 5: Solve for x
    x = 127,023,412,239.36/346,420.80
  6. Step 6: Final answer
    x = 366,673.75

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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.