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Finding the Fourth Proportional to 631,560, 871,941.60 and 405,603.84

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Solution

The fourth proportional to 631,560, 871,941.60 and 405,603.84 is: 559,983.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,560 : 871,941.60 = 405,603.84 : x
  2. Step 2: Convert to fraction form
    631,560/871,941.60 = 405,603.84/x
  3. Step 3: Cross multiply
    631,560x = 871,941.60 × 405,603.84
  4. Step 4: Simplify right side
    631,560x = 353,662,861,215.74
  5. Step 5: Solve for x
    x = 353,662,861,215.74/631,560
  6. Step 6: Final answer
    x = 559,983.00

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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.