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Finding the Fourth Proportional to 738.45, 1,019.05 and 402.35

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Solution

The fourth proportional to 738.45, 1,019.05 and 402.35 is: 555.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.45 : 1,019.05 = 402.35 : x
  2. Step 2: Convert to fraction form
    738.45/1,019.05 = 402.35/x
  3. Step 3: Cross multiply
    738.45x = 1,019.05 × 402.35
  4. Step 4: Simplify right side
    738.45x = 410,014.00
  5. Step 5: Solve for x
    x = 410,014.00/738.45
  6. Step 6: Final answer
    x = 555.24

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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.