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Finding the Fourth Proportional to 486,642.18, 666,688.62 and 468,448.20

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Solution

The fourth proportional to 486,642.18, 666,688.62 and 468,448.20 is: 641,763.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,642.18 : 666,688.62 = 468,448.20 : x
  2. Step 2: Convert to fraction form
    486,642.18/666,688.62 = 468,448.20/x
  3. Step 3: Cross multiply
    486,642.18x = 666,688.62 × 468,448.20
  4. Step 4: Simplify right side
    486,642.18x = 312,309,083,999.48
  5. Step 5: Solve for x
    x = 312,309,083,999.48/486,642.18
  6. Step 6: Final answer
    x = 641,763.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.