Home / 877,611.20-1,316,416.80-428,620.10

Finding the Fourth Proportional to 877,611.20, 1,316,416.80 and 428,620.10

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Solution

The fourth proportional to 877,611.20, 1,316,416.80 and 428,620.10 is: 642,930.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,611.20 : 1,316,416.80 = 428,620.10 : x
  2. Step 2: Convert to fraction form
    877,611.20/1,316,416.80 = 428,620.10/x
  3. Step 3: Cross multiply
    877,611.20x = 1,316,416.80 × 428,620.10
  4. Step 4: Simplify right side
    877,611.20x = 564,242,700,457.68
  5. Step 5: Solve for x
    x = 564,242,700,457.68/877,611.20
  6. Step 6: Final answer
    x = 642,930.15

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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.