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Finding the Fourth Proportional to 656,900.21, 906,522.55 and 355,094.21

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Solution

The fourth proportional to 656,900.21, 906,522.55 and 355,094.21 is: 490,030.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,900.21 : 906,522.55 = 355,094.21 : x
  2. Step 2: Convert to fraction form
    656,900.21/906,522.55 = 355,094.21/x
  3. Step 3: Cross multiply
    656,900.21x = 906,522.55 × 355,094.21
  4. Step 4: Simplify right side
    656,900.21x = 321,900,910,118.01
  5. Step 5: Solve for x
    x = 321,900,910,118.01/656,900.21
  6. Step 6: Final answer
    x = 490,030.15

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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.