Home / 877,115.20-1,315,672.80-428,124.10

Finding the Fourth Proportional to 877,115.20, 1,315,672.80 and 428,124.10

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Solution

The fourth proportional to 877,115.20, 1,315,672.80 and 428,124.10 is: 642,186.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,115.20 : 1,315,672.80 = 428,124.10 : x
  2. Step 2: Convert to fraction form
    877,115.20/1,315,672.80 = 428,124.10/x
  3. Step 3: Cross multiply
    877,115.20x = 1,315,672.80 × 428,124.10
  4. Step 4: Simplify right side
    877,115.20x = 563,271,233,394.48
  5. Step 5: Solve for x
    x = 563,271,233,394.48/877,115.20
  6. Step 6: Final answer
    x = 642,186.15

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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.