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Finding the Fourth Proportional to 388,864.40, 583,296.60 and 339,712.40

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Solution

The fourth proportional to 388,864.40, 583,296.60 and 339,712.40 is: 509,568.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,864.40 : 583,296.60 = 339,712.40 : x
  2. Step 2: Convert to fraction form
    388,864.40/583,296.60 = 339,712.40/x
  3. Step 3: Cross multiply
    388,864.40x = 583,296.60 × 339,712.40
  4. Step 4: Simplify right side
    388,864.40x = 198,153,087,897.84
  5. Step 5: Solve for x
    x = 198,153,087,897.84/388,864.40
  6. Step 6: Final answer
    x = 509,568.60

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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.