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Finding the Fourth Proportional to 877,588, 1,316,382 and 212,740

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Solution

The fourth proportional to 877,588, 1,316,382 and 212,740 is: 319,110

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,588 : 1,316,382 = 212,740 : x
  2. Step 2: Convert to fraction form
    877,588/1,316,382 = 212,740/x
  3. Step 3: Cross multiply
    877,588x = 1,316,382 × 212,740
  4. Step 4: Simplify right side
    877,588x = 280,047,106,680
  5. Step 5: Solve for x
    x = 280,047,106,680/877,588
  6. Step 6: Final answer
    x = 319,110

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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.