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Finding the Fourth Proportional to 359,393.60, 539,090.40 and 318,958.40

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Solution

The fourth proportional to 359,393.60, 539,090.40 and 318,958.40 is: 478,437.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,393.60 : 539,090.40 = 318,958.40 : x
  2. Step 2: Convert to fraction form
    359,393.60/539,090.40 = 318,958.40/x
  3. Step 3: Cross multiply
    359,393.60x = 539,090.40 × 318,958.40
  4. Step 4: Simplify right side
    359,393.60x = 171,947,411,439.36
  5. Step 5: Solve for x
    x = 171,947,411,439.36/359,393.60
  6. Step 6: Final answer
    x = 478,437.60

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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.