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Finding the Fourth Proportional to 813,803, 1,123,061.66 and 451,242.16

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Solution

The fourth proportional to 813,803, 1,123,061.66 and 451,242.16 is: 622,721.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,803 : 1,123,061.66 = 451,242.16 : x
  2. Step 2: Convert to fraction form
    813,803/1,123,061.66 = 451,242.16/x
  3. Step 3: Cross multiply
    813,803x = 1,123,061.66 × 451,242.16
  4. Step 4: Simplify right side
    813,803x = 506,772,769,271.59
  5. Step 5: Solve for x
    x = 506,772,769,271.59/813,803
  6. Step 6: Final answer
    x = 622,721.68

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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.