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Finding the Fourth Proportional to 461,420.20, 692,130.30 and 212,588.20

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Solution

The fourth proportional to 461,420.20, 692,130.30 and 212,588.20 is: 318,882.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,420.20 : 692,130.30 = 212,588.20 : x
  2. Step 2: Convert to fraction form
    461,420.20/692,130.30 = 212,588.20/x
  3. Step 3: Cross multiply
    461,420.20x = 692,130.30 × 212,588.20
  4. Step 4: Simplify right side
    461,420.20x = 147,138,734,642.46
  5. Step 5: Solve for x
    x = 147,138,734,642.46/461,420.20
  6. Step 6: Final answer
    x = 318,882.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.