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Finding the Fourth Proportional to 492,799.60, 690,386 and 492,799.60

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Solution

The fourth proportional to 492,799.60, 690,386 and 492,799.60 is: 690,386

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,799.60 : 690,386 = 492,799.60 : x
  2. Step 2: Convert to fraction form
    492,799.60/690,386 = 492,799.60/x
  3. Step 3: Cross multiply
    492,799.60x = 690,386 × 492,799.60
  4. Step 4: Simplify right side
    492,799.60x = 340,221,944,645.60
  5. Step 5: Solve for x
    x = 340,221,944,645.60/492,799.60
  6. Step 6: Final answer
    x = 690,386

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.