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Finding the Fourth Proportional to 631,624.53, 871,730.76 and 402,108.45

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Solution

The fourth proportional to 631,624.53, 871,730.76 and 402,108.45 is: 554,966.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,624.53 : 871,730.76 = 402,108.45 : x
  2. Step 2: Convert to fraction form
    631,624.53/871,730.76 = 402,108.45/x
  3. Step 3: Cross multiply
    631,624.53x = 871,730.76 × 402,108.45
  4. Step 4: Simplify right side
    631,624.53x = 350,530,305,601.46
  5. Step 5: Solve for x
    x = 350,530,305,601.46/631,624.53
  6. Step 6: Final answer
    x = 554,966.26

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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.