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Finding the Fourth Proportional to 641,603.90, 885,434.28 and 369,650.46

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Solution

The fourth proportional to 641,603.90, 885,434.28 and 369,650.46 is: 510,129.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,603.90 : 885,434.28 = 369,650.46 : x
  2. Step 2: Convert to fraction form
    641,603.90/885,434.28 = 369,650.46/x
  3. Step 3: Cross multiply
    641,603.90x = 885,434.28 × 369,650.46
  4. Step 4: Simplify right side
    641,603.90x = 327,301,188,901.77
  5. Step 5: Solve for x
    x = 327,301,188,901.77/641,603.90
  6. Step 6: Final answer
    x = 510,129.67

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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.