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Finding the Fourth Proportional to 478,319.12, 660,055.46 and 297,027.21

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Solution

The fourth proportional to 478,319.12, 660,055.46 and 297,027.21 is: 409,882.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,319.12 : 660,055.46 = 297,027.21 : x
  2. Step 2: Convert to fraction form
    478,319.12/660,055.46 = 297,027.21/x
  3. Step 3: Cross multiply
    478,319.12x = 660,055.46 × 297,027.21
  4. Step 4: Simplify right side
    478,319.12x = 196,054,431,729.07
  5. Step 5: Solve for x
    x = 196,054,431,729.07/478,319.12
  6. Step 6: Final answer
    x = 409,882.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.