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Finding the Fourth Proportional to 1,320,513.76, 1,822,318.32 and 716,901.76

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Solution

The fourth proportional to 1,320,513.76, 1,822,318.32 and 716,901.76 is: 989,329.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,513.76 : 1,822,318.32 = 716,901.76 : x
  2. Step 2: Convert to fraction form
    1,320,513.76/1,822,318.32 = 716,901.76/x
  3. Step 3: Cross multiply
    1,320,513.76x = 1,822,318.32 × 716,901.76
  4. Step 4: Simplify right side
    1,320,513.76x = 1,306,423,210,888.24
  5. Step 5: Solve for x
    x = 1,306,423,210,888.24/1,320,513.76
  6. Step 6: Final answer
    x = 989,329.49

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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.