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Finding the Fourth Proportional to 709,817.60, 979,990.44 and 451,840.16

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Solution

The fourth proportional to 709,817.60, 979,990.44 and 451,840.16 is: 623,820.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,817.60 : 979,990.44 = 451,840.16 : x
  2. Step 2: Convert to fraction form
    709,817.60/979,990.44 = 451,840.16/x
  3. Step 3: Cross multiply
    709,817.60x = 979,990.44 × 451,840.16
  4. Step 4: Simplify right side
    709,817.60x = 442,799,037,208.07
  5. Step 5: Solve for x
    x = 442,799,037,208.07/709,817.60
  6. Step 6: Final answer
    x = 623,820.88

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1.5x scale

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.