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Finding the Fourth Proportional to 659,639.80, 988,293.30 and 559,329.40

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Solution

The fourth proportional to 659,639.80, 988,293.30 and 559,329.40 is: 838,005.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,639.80 : 988,293.30 = 559,329.40 : x
  2. Step 2: Convert to fraction form
    659,639.80/988,293.30 = 559,329.40/x
  3. Step 3: Cross multiply
    659,639.80x = 988,293.30 × 559,329.40
  4. Step 4: Simplify right side
    659,639.80x = 552,781,498,513.02
  5. Step 5: Solve for x
    x = 552,781,498,513.02/659,639.80
  6. Step 6: Final answer
    x = 838,005.07

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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.