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Finding the Fourth Proportional to 359,970.40, 539,955.60 and 289,986.40

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Solution

The fourth proportional to 359,970.40, 539,955.60 and 289,986.40 is: 434,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,970.40 : 539,955.60 = 289,986.40 : x
  2. Step 2: Convert to fraction form
    359,970.40/539,955.60 = 289,986.40/x
  3. Step 3: Cross multiply
    359,970.40x = 539,955.60 × 289,986.40
  4. Step 4: Simplify right side
    359,970.40x = 156,579,780,603.84
  5. Step 5: Solve for x
    x = 156,579,780,603.84/359,970.40
  6. Step 6: Final answer
    x = 434,979.60

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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.