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Finding the Fourth Proportional to 331,347.40, 497,021.10 and 213,152.20

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Solution

The fourth proportional to 331,347.40, 497,021.10 and 213,152.20 is: 319,728.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,347.40 : 497,021.10 = 213,152.20 : x
  2. Step 2: Convert to fraction form
    331,347.40/497,021.10 = 213,152.20/x
  3. Step 3: Cross multiply
    331,347.40x = 497,021.10 × 213,152.20
  4. Step 4: Simplify right side
    331,347.40x = 105,941,140,911.42
  5. Step 5: Solve for x
    x = 105,941,140,911.42/331,347.40
  6. Step 6: Final answer
    x = 319,728.30

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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.