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Finding the Fourth Proportional to 919,703.04, 1,379,762.20 and 280,064

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Solution

The fourth proportional to 919,703.04, 1,379,762.20 and 280,064 is: 420,159.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,703.04 : 1,379,762.20 = 280,064 : x
  2. Step 2: Convert to fraction form
    919,703.04/1,379,762.20 = 280,064/x
  3. Step 3: Cross multiply
    919,703.04x = 1,379,762.20 × 280,064
  4. Step 4: Simplify right side
    919,703.04x = 386,421,720,780.80
  5. Step 5: Solve for x
    x = 386,421,720,780.80/919,703.04
  6. Step 6: Final answer
    x = 420,159.23

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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.