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Finding the Fourth Proportional to 869,840.40, 1,303,205.40 and 745,424.40

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Solution

The fourth proportional to 869,840.40, 1,303,205.40 and 745,424.40 is: 1,116,803.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,840.40 : 1,303,205.40 = 745,424.40 : x
  2. Step 2: Convert to fraction form
    869,840.40/1,303,205.40 = 745,424.40/x
  3. Step 3: Cross multiply
    869,840.40x = 1,303,205.40 × 745,424.40
  4. Step 4: Simplify right side
    869,840.40x = 971,441,103,371.76
  5. Step 5: Solve for x
    x = 971,441,103,371.76/869,840.40
  6. Step 6: Final answer
    x = 1,116,803.85

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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.