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Finding the Fourth Proportional to 343,422.40, 515,133.60 and 90,702.40

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Solution

The fourth proportional to 343,422.40, 515,133.60 and 90,702.40 is: 136,053.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,422.40 : 515,133.60 = 90,702.40 : x
  2. Step 2: Convert to fraction form
    343,422.40/515,133.60 = 90,702.40/x
  3. Step 3: Cross multiply
    343,422.40x = 515,133.60 × 90,702.40
  4. Step 4: Simplify right side
    343,422.40x = 46,723,853,840.64
  5. Step 5: Solve for x
    x = 46,723,853,840.64/343,422.40
  6. Step 6: Final answer
    x = 136,053.60

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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.