Home / 521,669.61-786,527.53-518,431.23

Finding the Fourth Proportional to 521,669.61, 786,527.53 and 518,431.23

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Solution

The fourth proportional to 521,669.61, 786,527.53 and 518,431.23 is: 781,644.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,669.61 : 786,527.53 = 518,431.23 : x
  2. Step 2: Convert to fraction form
    521,669.61/786,527.53 = 518,431.23/x
  3. Step 3: Cross multiply
    521,669.61x = 786,527.53 × 518,431.23
  4. Step 4: Simplify right side
    521,669.61x = 407,760,433,510.68
  5. Step 5: Solve for x
    x = 407,760,433,510.68/521,669.61
  6. Step 6: Final answer
    x = 781,644.98

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.