Home / 628,478.81-867,320.28-356,558.16

Finding the Fourth Proportional to 628,478.81, 867,320.28 and 356,558.16

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Solution

The fourth proportional to 628,478.81, 867,320.28 and 356,558.16 is: 492,061.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,478.81 : 867,320.28 = 356,558.16 : x
  2. Step 2: Convert to fraction form
    628,478.81/867,320.28 = 356,558.16/x
  3. Step 3: Cross multiply
    628,478.81x = 867,320.28 × 356,558.16
  4. Step 4: Simplify right side
    628,478.81x = 309,250,123,167.49
  5. Step 5: Solve for x
    x = 309,250,123,167.49/628,478.81
  6. Step 6: Final answer
    x = 492,061.34

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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.