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Finding the Fourth Proportional to 660,001.20, 990,390.60 and 436,009.20

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Solution

The fourth proportional to 660,001.20, 990,390.60 and 436,009.20 is: 654,270.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,001.20 : 990,390.60 = 436,009.20 : x
  2. Step 2: Convert to fraction form
    660,001.20/990,390.60 = 436,009.20/x
  3. Step 3: Cross multiply
    660,001.20x = 990,390.60 × 436,009.20
  4. Step 4: Simplify right side
    660,001.20x = 431,819,413,193.52
  5. Step 5: Solve for x
    x = 431,819,413,193.52/660,001.20
  6. Step 6: Final answer
    x = 654,270.65

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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.