Home / 486,240.23-670,387.73-398,702.86

Finding the Fourth Proportional to 486,240.23, 670,387.73 and 398,702.86

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Solution

The fourth proportional to 486,240.23, 670,387.73 and 398,702.86 is: 549,698.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,240.23 : 670,387.73 = 398,702.86 : x
  2. Step 2: Convert to fraction form
    486,240.23/670,387.73 = 398,702.86/x
  3. Step 3: Cross multiply
    486,240.23x = 670,387.73 × 398,702.86
  4. Step 4: Simplify right side
    486,240.23x = 267,285,501,590.42
  5. Step 5: Solve for x
    x = 267,285,501,590.42/486,240.23
  6. Step 6: Final answer
    x = 549,698.45

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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.