Home / 1,220,186.70-1,830,199.71-421,479.66

Finding the Fourth Proportional to 1,220,186.70, 1,830,199.71 and 421,479.66

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Solution

The fourth proportional to 1,220,186.70, 1,830,199.71 and 421,479.66 is: 632,191.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220,186.70 : 1,830,199.71 = 421,479.66 : x
  2. Step 2: Convert to fraction form
    1,220,186.70/1,830,199.71 = 421,479.66/x
  3. Step 3: Cross multiply
    1,220,186.70x = 1,830,199.71 × 421,479.66
  4. Step 4: Simplify right side
    1,220,186.70x = 771,391,951,502.90
  5. Step 5: Solve for x
    x = 771,391,951,502.90/1,220,186.70
  6. Step 6: Final answer
    x = 632,191.74

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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.