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Finding the Fourth Proportional to 867,618.80, 1,298,803.80 and 773,140.40

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Solution

The fourth proportional to 867,618.80, 1,298,803.80 and 773,140.40 is: 1,157,371.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,618.80 : 1,298,803.80 = 773,140.40 : x
  2. Step 2: Convert to fraction form
    867,618.80/1,298,803.80 = 773,140.40/x
  3. Step 3: Cross multiply
    867,618.80x = 1,298,803.80 × 773,140.40
  4. Step 4: Simplify right side
    867,618.80x = 1,004,157,689,453.52
  5. Step 5: Solve for x
    x = 1,004,157,689,453.52/867,618.80
  6. Step 6: Final answer
    x = 1,157,371.98

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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.