Home / 1,320,056.74-1,980,068.40-421,487.09

Finding the Fourth Proportional to 1,320,056.74, 1,980,068.40 and 421,487.09

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Solution

The fourth proportional to 1,320,056.74, 1,980,068.40 and 421,487.09 is: 632,225.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,056.74 : 1,980,068.40 = 421,487.09 : x
  2. Step 2: Convert to fraction form
    1,320,056.74/1,980,068.40 = 421,487.09/x
  3. Step 3: Cross multiply
    1,320,056.74x = 1,980,068.40 × 421,487.09
  4. Step 4: Simplify right side
    1,320,056.74x = 834,573,265,441.87
  5. Step 5: Solve for x
    x = 834,573,265,441.87/1,320,056.74
  6. Step 6: Final answer
    x = 632,225.30

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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.