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Finding the Fourth Proportional to 402,523.40, 555,482.74 and 221,235.28

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Solution

The fourth proportional to 402,523.40, 555,482.74 and 221,235.28 is: 305,304.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,523.40 : 555,482.74 = 221,235.28 : x
  2. Step 2: Convert to fraction form
    402,523.40/555,482.74 = 221,235.28/x
  3. Step 3: Cross multiply
    402,523.40x = 555,482.74 × 221,235.28
  4. Step 4: Simplify right side
    402,523.40x = 122,892,379,519.07
  5. Step 5: Solve for x
    x = 122,892,379,519.07/402,523.40
  6. Step 6: Final answer
    x = 305,304.93

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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.