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Finding the Fourth Proportional to 528,685.74, 727,742.43 and 456,318.21

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Solution

The fourth proportional to 528,685.74, 727,742.43 and 456,318.21 is: 628,127.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,685.74 : 727,742.43 = 456,318.21 : x
  2. Step 2: Convert to fraction form
    528,685.74/727,742.43 = 456,318.21/x
  3. Step 3: Cross multiply
    528,685.74x = 727,742.43 × 456,318.21
  4. Step 4: Simplify right side
    528,685.74x = 332,082,122,998.65
  5. Step 5: Solve for x
    x = 332,082,122,998.65/528,685.74
  6. Step 6: Final answer
    x = 628,127.63

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1.5x scale

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.