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Finding the Fourth Proportional to 442,790.40, 664,282.80 and 218,258.40

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Solution

The fourth proportional to 442,790.40, 664,282.80 and 218,258.40 is: 327,435.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,790.40 : 664,282.80 = 218,258.40 : x
  2. Step 2: Convert to fraction form
    442,790.40/664,282.80 = 218,258.40/x
  3. Step 3: Cross multiply
    442,790.40x = 664,282.80 × 218,258.40
  4. Step 4: Simplify right side
    442,790.40x = 144,985,301,075.52
  5. Step 5: Solve for x
    x = 144,985,301,075.52/442,790.40
  6. Step 6: Final answer
    x = 327,435.51

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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.