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Finding the Fourth Proportional to 223,488.59, 308,425.34 and 138,632.99

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Solution

The fourth proportional to 223,488.59, 308,425.34 and 138,632.99 is: 191,320.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,488.59 : 308,425.34 = 138,632.99 : x
  2. Step 2: Convert to fraction form
    223,488.59/308,425.34 = 138,632.99/x
  3. Step 3: Cross multiply
    223,488.59x = 308,425.34 × 138,632.99
  4. Step 4: Simplify right side
    223,488.59x = 42,757,927,075.97
  5. Step 5: Solve for x
    x = 42,757,927,075.97/223,488.59
  6. Step 6: Final answer
    x = 191,320.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.