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Finding the Fourth Proportional to 656,906.16, 906,531.12 and 355,100.16

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Solution

The fourth proportional to 656,906.16, 906,531.12 and 355,100.16 is: 490,038.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,906.16 : 906,531.12 = 355,100.16 : x
  2. Step 2: Convert to fraction form
    656,906.16/906,531.12 = 355,100.16/x
  3. Step 3: Cross multiply
    656,906.16x = 906,531.12 × 355,100.16
  4. Step 4: Simplify right side
    656,906.16x = 321,909,345,756.98
  5. Step 5: Solve for x
    x = 321,909,345,756.98/656,906.16
  6. Step 6: Final answer
    x = 490,038.56

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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.