Home / 787,686.40-1,178,905.20-724,700.80

Finding the Fourth Proportional to 787,686.40, 1,178,905.20 and 724,700.80

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Solution

The fourth proportional to 787,686.40, 1,178,905.20 and 724,700.80 is: 1,084,636.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,686.40 : 1,178,905.20 = 724,700.80 : x
  2. Step 2: Convert to fraction form
    787,686.40/1,178,905.20 = 724,700.80/x
  3. Step 3: Cross multiply
    787,686.40x = 1,178,905.20 × 724,700.80
  4. Step 4: Simplify right side
    787,686.40x = 854,353,541,564.16
  5. Step 5: Solve for x
    x = 854,353,541,564.16/787,686.40
  6. Step 6: Final answer
    x = 1,084,636.65

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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.