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Finding the Fourth Proportional to 390,739.49, 586,102.84 and 124,496.39

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Solution

The fourth proportional to 390,739.49, 586,102.84 and 124,496.39 is: 186,742.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,739.49 : 586,102.84 = 124,496.39 : x
  2. Step 2: Convert to fraction form
    390,739.49/586,102.84 = 124,496.39/x
  3. Step 3: Cross multiply
    390,739.49x = 586,102.84 × 124,496.39
  4. Step 4: Simplify right side
    390,739.49x = 72,967,688,902.76
  5. Step 5: Solve for x
    x = 72,967,688,902.76/390,739.49
  6. Step 6: Final answer
    x = 186,742.55

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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.