Home / 917,803.60-1,376,705.40-781,990.90

Finding the Fourth Proportional to 917,803.60, 1,376,705.40 and 781,990.90

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Solution

The fourth proportional to 917,803.60, 1,376,705.40 and 781,990.90 is: 1,172,986.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,803.60 : 1,376,705.40 = 781,990.90 : x
  2. Step 2: Convert to fraction form
    917,803.60/1,376,705.40 = 781,990.90/x
  3. Step 3: Cross multiply
    917,803.60x = 1,376,705.40 × 781,990.90
  4. Step 4: Simplify right side
    917,803.60x = 1,076,571,094,780.86
  5. Step 5: Solve for x
    x = 1,076,571,094,780.86/917,803.60
  6. Step 6: Final answer
    x = 1,172,986.35

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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.