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Finding the Fourth Proportional to 612,141.25, 918,264.81 and 168,909.25

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Solution

The fourth proportional to 612,141.25, 918,264.81 and 168,909.25 is: 253,378.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,141.25 : 918,264.81 = 168,909.25 : x
  2. Step 2: Convert to fraction form
    612,141.25/918,264.81 = 168,909.25/x
  3. Step 3: Cross multiply
    612,141.25x = 918,264.81 × 168,909.25
  4. Step 4: Simplify right side
    612,141.25x = 155,103,420,358.49
  5. Step 5: Solve for x
    x = 155,103,420,358.49/612,141.25
  6. Step 6: Final answer
    x = 253,378.48

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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.