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Finding the Fourth Proportional to 978,931.77, 1,351,007.27 and 543,390.11

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Solution

The fourth proportional to 978,931.77, 1,351,007.27 and 543,390.11 is: 749,923.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,931.77 : 1,351,007.27 = 543,390.11 : x
  2. Step 2: Convert to fraction form
    978,931.77/1,351,007.27 = 543,390.11/x
  3. Step 3: Cross multiply
    978,931.77x = 1,351,007.27 × 543,390.11
  4. Step 4: Simplify right side
    978,931.77x = 734,123,989,056.10
  5. Step 5: Solve for x
    x = 734,123,989,056.10/978,931.77
  6. Step 6: Final answer
    x = 749,923.55

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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.