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Finding the Fourth Proportional to 877,513, 1,316,269.50 and 212,665

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Solution

The fourth proportional to 877,513, 1,316,269.50 and 212,665 is: 318,997.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,513 : 1,316,269.50 = 212,665 : x
  2. Step 2: Convert to fraction form
    877,513/1,316,269.50 = 212,665/x
  3. Step 3: Cross multiply
    877,513x = 1,316,269.50 × 212,665
  4. Step 4: Simplify right side
    877,513x = 279,924,453,217.50
  5. Step 5: Solve for x
    x = 279,924,453,217.50/877,513
  6. Step 6: Final answer
    x = 318,997.50

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1.5x scale

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.