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Finding the Fourth Proportional to 288,420.20, 432,630.30 and 188,887.40

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Solution

The fourth proportional to 288,420.20, 432,630.30 and 188,887.40 is: 283,331.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,420.20 : 432,630.30 = 188,887.40 : x
  2. Step 2: Convert to fraction form
    288,420.20/432,630.30 = 188,887.40/x
  3. Step 3: Cross multiply
    288,420.20x = 432,630.30 × 188,887.40
  4. Step 4: Simplify right side
    288,420.20x = 81,718,412,528.22
  5. Step 5: Solve for x
    x = 81,718,412,528.22/288,420.20
  6. Step 6: Final answer
    x = 283,331.10

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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.