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Finding the Fourth Proportional to 988,761.60, 1,480,809.60 and 671,500.80

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Solution

The fourth proportional to 988,761.60, 1,480,809.60 and 671,500.80 is: 1,005,666.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    988,761.60 : 1,480,809.60 = 671,500.80 : x
  2. Step 2: Convert to fraction form
    988,761.60/1,480,809.60 = 671,500.80/x
  3. Step 3: Cross multiply
    988,761.60x = 1,480,809.60 × 671,500.80
  4. Step 4: Simplify right side
    988,761.60x = 994,364,831,047.68
  5. Step 5: Solve for x
    x = 994,364,831,047.68/988,761.60
  6. Step 6: Final answer
    x = 1,005,666.92

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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.