Home / 765,528.37-1,056,420.78-421,356.94

Finding the Fourth Proportional to 765,528.37, 1,056,420.78 and 421,356.94

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Solution

The fourth proportional to 765,528.37, 1,056,420.78 and 421,356.94 is: 581,467.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,528.37 : 1,056,420.78 = 421,356.94 : x
  2. Step 2: Convert to fraction form
    765,528.37/1,056,420.78 = 421,356.94/x
  3. Step 3: Cross multiply
    765,528.37x = 1,056,420.78 × 421,356.94
  4. Step 4: Simplify right side
    765,528.37x = 445,130,227,213.21
  5. Step 5: Solve for x
    x = 445,130,227,213.21/765,528.37
  6. Step 6: Final answer
    x = 581,467.97

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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.