Home / 665,820.09-918,784.49-379,287.45

Finding the Fourth Proportional to 665,820.09, 918,784.49 and 379,287.45

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Solution

The fourth proportional to 665,820.09, 918,784.49 and 379,287.45 is: 523,389.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,820.09 : 918,784.49 = 379,287.45 : x
  2. Step 2: Convert to fraction form
    665,820.09/918,784.49 = 379,287.45/x
  3. Step 3: Cross multiply
    665,820.09x = 918,784.49 × 379,287.45
  4. Step 4: Simplify right side
    665,820.09x = 348,483,424,415.21
  5. Step 5: Solve for x
    x = 348,483,424,415.21/665,820.09
  6. Step 6: Final answer
    x = 523,389.77

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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.