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Finding the Fourth Proportional to 492,802.60, 690,390.20 and 492,802.60

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Solution

The fourth proportional to 492,802.60, 690,390.20 and 492,802.60 is: 690,390.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,802.60 : 690,390.20 = 492,802.60 : x
  2. Step 2: Convert to fraction form
    492,802.60/690,390.20 = 492,802.60/x
  3. Step 3: Cross multiply
    492,802.60x = 690,390.20 × 492,802.60
  4. Step 4: Simplify right side
    492,802.60x = 340,226,085,574.52
  5. Step 5: Solve for x
    x = 340,226,085,574.52/492,802.60
  6. Step 6: Final answer
    x = 690,390.20

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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.