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Finding the Fourth Proportional to 359,990.40, 539,985.60 and 290,006.40

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Solution

The fourth proportional to 359,990.40, 539,985.60 and 290,006.40 is: 435,009.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,990.40 : 539,985.60 = 290,006.40 : x
  2. Step 2: Convert to fraction form
    359,990.40/539,985.60 = 290,006.40/x
  3. Step 3: Cross multiply
    359,990.40x = 539,985.60 × 290,006.40
  4. Step 4: Simplify right side
    359,990.40x = 156,599,279,907.84
  5. Step 5: Solve for x
    x = 156,599,279,907.84/359,990.40
  6. Step 6: Final answer
    x = 435,009.60

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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.