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Finding the Fourth Proportional to 259,675.80, 389,513.70 and 147,701.40

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Solution

The fourth proportional to 259,675.80, 389,513.70 and 147,701.40 is: 221,552.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,675.80 : 389,513.70 = 147,701.40 : x
  2. Step 2: Convert to fraction form
    259,675.80/389,513.70 = 147,701.40/x
  3. Step 3: Cross multiply
    259,675.80x = 389,513.70 × 147,701.40
  4. Step 4: Simplify right side
    259,675.80x = 57,531,718,809.18
  5. Step 5: Solve for x
    x = 57,531,718,809.18/259,675.80
  6. Step 6: Final answer
    x = 221,552.10

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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.