Home / 870,484.98-1,306,096.55-421,540.36

Finding the Fourth Proportional to 870,484.98, 1,306,096.55 and 421,540.36

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Solution

The fourth proportional to 870,484.98, 1,306,096.55 and 421,540.36 is: 632,489.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,484.98 : 1,306,096.55 = 421,540.36 : x
  2. Step 2: Convert to fraction form
    870,484.98/1,306,096.55 = 421,540.36/x
  3. Step 3: Cross multiply
    870,484.98x = 1,306,096.55 × 421,540.36
  4. Step 4: Simplify right side
    870,484.98x = 550,572,409,881.76
  5. Step 5: Solve for x
    x = 550,572,409,881.76/870,484.98
  6. Step 6: Final answer
    x = 632,489.27

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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.