Home / 877,620.20-1,316,430.30-428,629.10

Finding the Fourth Proportional to 877,620.20, 1,316,430.30 and 428,629.10

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Solution

The fourth proportional to 877,620.20, 1,316,430.30 and 428,629.10 is: 642,943.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,620.20 : 1,316,430.30 = 428,629.10 : x
  2. Step 2: Convert to fraction form
    877,620.20/1,316,430.30 = 428,629.10/x
  3. Step 3: Cross multiply
    877,620.20x = 1,316,430.30 × 428,629.10
  4. Step 4: Simplify right side
    877,620.20x = 564,260,334,701.73
  5. Step 5: Solve for x
    x = 564,260,334,701.73/877,620.20
  6. Step 6: Final answer
    x = 642,943.65

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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.