Home / 428,206,042.60-645,187,689.19-387,311,074.28

Finding the Fourth Proportional to 428,206,042.60, 645,187,689.19 and 387,311,074.28

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Solution

The fourth proportional to 428,206,042.60, 645,187,689.19 and 387,311,074.28 is: 583,570,319.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,206,042.60 : 645,187,689.19 = 387,311,074.28 : x
  2. Step 2: Convert to fraction form
    428,206,042.60/645,187,689.19 = 387,311,074.28/x
  3. Step 3: Cross multiply
    428,206,042.60x = 645,187,689.19 × 387,311,074.28
  4. Step 4: Simplify right side
    428,206,042.60x = 249,888,337,012,409,632
  5. Step 5: Solve for x
    x = 249,888,337,012,409,632/428,206,042.60
  6. Step 6: Final answer
    x = 583,570,319.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.