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Finding the Fourth Proportional to 345,218.40, 518,028.48 and 145,526.40

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Solution

The fourth proportional to 345,218.40, 518,028.48 and 145,526.40 is: 218,374.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,218.40 : 518,028.48 = 145,526.40 : x
  2. Step 2: Convert to fraction form
    345,218.40/518,028.48 = 145,526.40/x
  3. Step 3: Cross multiply
    345,218.40x = 518,028.48 × 145,526.40
  4. Step 4: Simplify right side
    345,218.40x = 75,386,819,791.87
  5. Step 5: Solve for x
    x = 75,386,819,791.87/345,218.40
  6. Step 6: Final answer
    x = 218,374.28

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1.5x scale

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.