Home / 714,291.10-985,740.90-392,012.65

Finding the Fourth Proportional to 714,291.10, 985,740.90 and 392,012.65

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Solution

The fourth proportional to 714,291.10, 985,740.90 and 392,012.65 is: 540,987.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,291.10 : 985,740.90 = 392,012.65 : x
  2. Step 2: Convert to fraction form
    714,291.10/985,740.90 = 392,012.65/x
  3. Step 3: Cross multiply
    714,291.10x = 985,740.90 × 392,012.65
  4. Step 4: Simplify right side
    714,291.10x = 386,422,902,422.39
  5. Step 5: Solve for x
    x = 386,422,902,422.39/714,291.10
  6. Step 6: Final answer
    x = 540,987.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.