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Finding the Fourth Proportional to 631,774.24, 871,862.40 and 345,312.88

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Solution

The fourth proportional to 631,774.24, 871,862.40 and 345,312.88 is: 476,539.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,774.24 : 871,862.40 = 345,312.88 : x
  2. Step 2: Convert to fraction form
    631,774.24/871,862.40 = 345,312.88/x
  3. Step 3: Cross multiply
    631,774.24x = 871,862.40 × 345,312.88
  4. Step 4: Simplify right side
    631,774.24x = 301,065,316,307.71
  5. Step 5: Solve for x
    x = 301,065,316,307.71/631,774.24
  6. Step 6: Final answer
    x = 476,539.40

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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.