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Finding the Fourth Proportional to 877,636, 1,316,454.18 and 212,788

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Solution

The fourth proportional to 877,636, 1,316,454.18 and 212,788 is: 319,182.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,636 : 1,316,454.18 = 212,788 : x
  2. Step 2: Convert to fraction form
    877,636/1,316,454.18 = 212,788/x
  3. Step 3: Cross multiply
    877,636x = 1,316,454.18 × 212,788
  4. Step 4: Simplify right side
    877,636x = 280,125,652,053.84
  5. Step 5: Solve for x
    x = 280,125,652,053.84/877,636
  6. Step 6: Final answer
    x = 319,182.04

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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.