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Finding the Fourth Proportional to 486,740.80, 730,111.20 and 345,023.20

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Solution

The fourth proportional to 486,740.80, 730,111.20 and 345,023.20 is: 517,534.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,740.80 : 730,111.20 = 345,023.20 : x
  2. Step 2: Convert to fraction form
    486,740.80/730,111.20 = 345,023.20/x
  3. Step 3: Cross multiply
    486,740.80x = 730,111.20 × 345,023.20
  4. Step 4: Simplify right side
    486,740.80x = 251,905,302,579.84
  5. Step 5: Solve for x
    x = 251,905,302,579.84/486,740.80
  6. Step 6: Final answer
    x = 517,534.80

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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.