Home / 766,703.64-1,148,581.49-428,719.19

Finding the Fourth Proportional to 766,703.64, 1,148,581.49 and 428,719.19

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Solution

The fourth proportional to 766,703.64, 1,148,581.49 and 428,719.19 is: 642,254.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,703.64 : 1,148,581.49 = 428,719.19 : x
  2. Step 2: Convert to fraction form
    766,703.64/1,148,581.49 = 428,719.19/x
  3. Step 3: Cross multiply
    766,703.64x = 1,148,581.49 × 428,719.19
  4. Step 4: Simplify right side
    766,703.64x = 492,418,918,155.29
  5. Step 5: Solve for x
    x = 492,418,918,155.29/766,703.64
  6. Step 6: Final answer
    x = 642,254.57

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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.