Home / 628,639.50-867,541.32-387,061.46

Finding the Fourth Proportional to 628,639.50, 867,541.32 and 387,061.46

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Solution

The fourth proportional to 628,639.50, 867,541.32 and 387,061.46 is: 534,156.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,639.50 : 867,541.32 = 387,061.46 : x
  2. Step 2: Convert to fraction form
    628,639.50/867,541.32 = 387,061.46/x
  3. Step 3: Cross multiply
    628,639.50x = 867,541.32 × 387,061.46
  4. Step 4: Simplify right side
    628,639.50x = 335,791,809,929.53
  5. Step 5: Solve for x
    x = 335,791,809,929.53/628,639.50
  6. Step 6: Final answer
    x = 534,156.40

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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.