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Finding the Fourth Proportional to 631,476.77, 871,724.70 and 402,348.20

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Solution

The fourth proportional to 631,476.77, 871,724.70 and 402,348.20 is: 555,423.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,476.77 : 871,724.70 = 402,348.20 : x
  2. Step 2: Convert to fraction form
    631,476.77/871,724.70 = 402,348.20/x
  3. Step 3: Cross multiply
    631,476.77x = 871,724.70 × 402,348.20
  4. Step 4: Simplify right side
    631,476.77x = 350,736,864,108.21
  5. Step 5: Solve for x
    x = 350,736,864,108.21/631,476.77
  6. Step 6: Final answer
    x = 555,423.22

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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.