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Finding the Fourth Proportional to 287,752.20, 431,628.30 and 188,219.40

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Solution

The fourth proportional to 287,752.20, 431,628.30 and 188,219.40 is: 282,329.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,752.20 : 431,628.30 = 188,219.40 : x
  2. Step 2: Convert to fraction form
    287,752.20/431,628.30 = 188,219.40/x
  3. Step 3: Cross multiply
    287,752.20x = 431,628.30 × 188,219.40
  4. Step 4: Simplify right side
    287,752.20x = 81,240,819,649.02
  5. Step 5: Solve for x
    x = 81,240,819,649.02/287,752.20
  6. Step 6: Final answer
    x = 282,329.10

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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.