Home / 877,415.71-1,316,609.94-428,140.30

Finding the Fourth Proportional to 877,415.71, 1,316,609.94 and 428,140.30

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Solution

The fourth proportional to 877,415.71, 1,316,609.94 and 428,140.30 is: 642,447.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,415.71 : 1,316,609.94 = 428,140.30 : x
  2. Step 2: Convert to fraction form
    877,415.71/1,316,609.94 = 428,140.30/x
  3. Step 3: Cross multiply
    877,415.71x = 1,316,609.94 × 428,140.30
  4. Step 4: Simplify right side
    877,415.71x = 563,693,774,694.58
  5. Step 5: Solve for x
    x = 563,693,774,694.58/877,415.71
  6. Step 6: Final answer
    x = 642,447.78

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1.5x scale

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.