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Finding the Fourth Proportional to 615,121.40, 922,682.10 and 349,400.90

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Solution

The fourth proportional to 615,121.40, 922,682.10 and 349,400.90 is: 524,101.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,121.40 : 922,682.10 = 349,400.90 : x
  2. Step 2: Convert to fraction form
    615,121.40/922,682.10 = 349,400.90/x
  3. Step 3: Cross multiply
    615,121.40x = 922,682.10 × 349,400.90
  4. Step 4: Simplify right side
    615,121.40x = 322,385,956,153.89
  5. Step 5: Solve for x
    x = 322,385,956,153.89/615,121.40
  6. Step 6: Final answer
    x = 524,101.35

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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.