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Finding the Fourth Proportional to 631,020.76, 871,729.86 and 545,990.20

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Solution

The fourth proportional to 631,020.76, 871,729.86 and 545,990.20 is: 754,263.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,020.76 : 871,729.86 = 545,990.20 : x
  2. Step 2: Convert to fraction form
    631,020.76/871,729.86 = 545,990.20/x
  3. Step 3: Cross multiply
    631,020.76x = 871,729.86 × 545,990.20
  4. Step 4: Simplify right side
    631,020.76x = 475,955,960,607.37
  5. Step 5: Solve for x
    x = 475,955,960,607.37/631,020.76
  6. Step 6: Final answer
    x = 754,263.55

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Double scale
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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.