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Finding the Fourth Proportional to 531,118.20, 797,130.90 and 215,801.40

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Solution

The fourth proportional to 531,118.20, 797,130.90 and 215,801.40 is: 323,886.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,118.20 : 797,130.90 = 215,801.40 : x
  2. Step 2: Convert to fraction form
    531,118.20/797,130.90 = 215,801.40/x
  3. Step 3: Cross multiply
    531,118.20x = 797,130.90 × 215,801.40
  4. Step 4: Simplify right side
    531,118.20x = 172,021,964,203.26
  5. Step 5: Solve for x
    x = 172,021,964,203.26/531,118.20
  6. Step 6: Final answer
    x = 323,886.40

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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.