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Finding the Fourth Proportional to 355,428.48, 490,173.70 and 294,903.28

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Solution

The fourth proportional to 355,428.48, 490,173.70 and 294,903.28 is: 406,703.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,428.48 : 490,173.70 = 294,903.28 : x
  2. Step 2: Convert to fraction form
    355,428.48/490,173.70 = 294,903.28/x
  3. Step 3: Cross multiply
    355,428.48x = 490,173.70 × 294,903.28
  4. Step 4: Simplify right side
    355,428.48x = 144,553,831,899.74
  5. Step 5: Solve for x
    x = 144,553,831,899.74/355,428.48
  6. Step 6: Final answer
    x = 406,703.01

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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.