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Finding the Fourth Proportional to 659,657.60, 989,389.20 and 186,390.80

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Solution

The fourth proportional to 659,657.60, 989,389.20 and 186,390.80 is: 279,558.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,657.60 : 989,389.20 = 186,390.80 : x
  2. Step 2: Convert to fraction form
    659,657.60/989,389.20 = 186,390.80/x
  3. Step 3: Cross multiply
    659,657.60x = 989,389.20 × 186,390.80
  4. Step 4: Simplify right side
    659,657.60x = 184,413,044,499.36
  5. Step 5: Solve for x
    x = 184,413,044,499.36/659,657.60
  6. Step 6: Final answer
    x = 279,558.74

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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.