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Finding the Fourth Proportional to 390,864.40, 586,296.60 and 124,622.80

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Solution

The fourth proportional to 390,864.40, 586,296.60 and 124,622.80 is: 186,934.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,864.40 : 586,296.60 = 124,622.80 : x
  2. Step 2: Convert to fraction form
    390,864.40/586,296.60 = 124,622.80/x
  3. Step 3: Cross multiply
    390,864.40x = 586,296.60 × 124,622.80
  4. Step 4: Simplify right side
    390,864.40x = 73,065,923,922.48
  5. Step 5: Solve for x
    x = 73,065,923,922.48/390,864.40
  6. Step 6: Final answer
    x = 186,934.20

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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.