Home / 668,840.90-1,003,261.35-385,405.70

Finding the Fourth Proportional to 668,840.90, 1,003,261.35 and 385,405.70

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Solution

The fourth proportional to 668,840.90, 1,003,261.35 and 385,405.70 is: 578,108.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,840.90 : 1,003,261.35 = 385,405.70 : x
  2. Step 2: Convert to fraction form
    668,840.90/1,003,261.35 = 385,405.70/x
  3. Step 3: Cross multiply
    668,840.90x = 1,003,261.35 × 385,405.70
  4. Step 4: Simplify right side
    668,840.90x = 386,662,642,879.70
  5. Step 5: Solve for x
    x = 386,662,642,879.70/668,840.90
  6. Step 6: Final answer
    x = 578,108.55

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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.