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Finding the Fourth Proportional to 470,728.60, 706,092.90 and 155,109.40

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Solution

The fourth proportional to 470,728.60, 706,092.90 and 155,109.40 is: 232,664.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,728.60 : 706,092.90 = 155,109.40 : x
  2. Step 2: Convert to fraction form
    470,728.60/706,092.90 = 155,109.40/x
  3. Step 3: Cross multiply
    470,728.60x = 706,092.90 × 155,109.40
  4. Step 4: Simplify right side
    470,728.60x = 109,521,646,063.26
  5. Step 5: Solve for x
    x = 109,521,646,063.26/470,728.60
  6. Step 6: Final answer
    x = 232,664.10

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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.