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Finding the Fourth Proportional to 478,320.12, 660,056.84 and 297,028.21

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Solution

The fourth proportional to 478,320.12, 660,056.84 and 297,028.21 is: 409,883.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,320.12 : 660,056.84 = 297,028.21 : x
  2. Step 2: Convert to fraction form
    478,320.12/660,056.84 = 297,028.21/x
  3. Step 3: Cross multiply
    478,320.12x = 660,056.84 × 297,028.21
  4. Step 4: Simplify right side
    478,320.12x = 196,055,501,683.46
  5. Step 5: Solve for x
    x = 196,055,501,683.46/478,320.12
  6. Step 6: Final answer
    x = 409,883.45

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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.