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Finding the Fourth Proportional to 458,316.60, 688,511.70 and 318,348.60

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Solution

The fourth proportional to 458,316.60, 688,511.70 and 318,348.60 is: 478,243.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,316.60 : 688,511.70 = 318,348.60 : x
  2. Step 2: Convert to fraction form
    458,316.60/688,511.70 = 318,348.60/x
  3. Step 3: Cross multiply
    458,316.60x = 688,511.70 × 318,348.60
  4. Step 4: Simplify right side
    458,316.60x = 219,186,735,778.62
  5. Step 5: Solve for x
    x = 219,186,735,778.62/458,316.60
  6. Step 6: Final answer
    x = 478,243.07

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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.