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Finding the Fourth Proportional to 487,415.90, 730,139.70 and 276,807.80

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Solution

The fourth proportional to 487,415.90, 730,139.70 and 276,807.80 is: 414,652.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,415.90 : 730,139.70 = 276,807.80 : x
  2. Step 2: Convert to fraction form
    487,415.90/730,139.70 = 276,807.80/x
  3. Step 3: Cross multiply
    487,415.90x = 730,139.70 × 276,807.80
  4. Step 4: Simplify right side
    487,415.90x = 202,108,364,049.66
  5. Step 5: Solve for x
    x = 202,108,364,049.66/487,415.90
  6. Step 6: Final answer
    x = 414,652.79

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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.