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Finding the Fourth Proportional to 462,928.86, 639,204.21 and 355,328.46

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Solution

The fourth proportional to 462,928.86, 639,204.21 and 355,328.46 is: 490,631.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    462,928.86 : 639,204.21 = 355,328.46 : x
  2. Step 2: Convert to fraction form
    462,928.86/639,204.21 = 355,328.46/x
  3. Step 3: Cross multiply
    462,928.86x = 639,204.21 × 355,328.46
  4. Step 4: Simplify right side
    462,928.86x = 227,127,447,564.82
  5. Step 5: Solve for x
    x = 227,127,447,564.82/462,928.86
  6. Step 6: Final answer
    x = 490,631.43

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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.