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Finding the Fourth Proportional to 598,641.20, 898,998.60 and 318,705.20

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Solution

The fourth proportional to 598,641.20, 898,998.60 and 318,705.20 is: 478,609.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    598,641.20 : 898,998.60 = 318,705.20 : x
  2. Step 2: Convert to fraction form
    598,641.20/898,998.60 = 318,705.20/x
  3. Step 3: Cross multiply
    598,641.20x = 898,998.60 × 318,705.20
  4. Step 4: Simplify right side
    598,641.20x = 286,515,528,612.72
  5. Step 5: Solve for x
    x = 286,515,528,612.72/598,641.20
  6. Step 6: Final answer
    x = 478,609.77

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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.