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Finding the Fourth Proportional to 420,370.07, 579,959.06 and 323,603.51

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Solution

The fourth proportional to 420,370.07, 579,959.06 and 323,603.51 is: 446,456.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,370.07 : 579,959.06 = 323,603.51 : x
  2. Step 2: Convert to fraction form
    420,370.07/579,959.06 = 323,603.51/x
  3. Step 3: Cross multiply
    420,370.07x = 579,959.06 × 323,603.51
  4. Step 4: Simplify right side
    420,370.07x = 187,676,782,954.49
  5. Step 5: Solve for x
    x = 187,676,782,954.49/420,370.07
  6. Step 6: Final answer
    x = 446,456.11

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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.