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Finding the Fourth Proportional to 612,417.28, 918,643.20 and 169,185.28

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Solution

The fourth proportional to 612,417.28, 918,643.20 and 169,185.28 is: 253,782.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,417.28 : 918,643.20 = 169,185.28 : x
  2. Step 2: Convert to fraction form
    612,417.28/918,643.20 = 169,185.28/x
  3. Step 3: Cross multiply
    612,417.28x = 918,643.20 × 169,185.28
  4. Step 4: Simplify right side
    612,417.28x = 155,420,907,012.10
  5. Step 5: Solve for x
    x = 155,420,907,012.10/612,417.28
  6. Step 6: Final answer
    x = 253,782.69

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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.