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Finding the Fourth Proportional to 521,392.36, 719,354.16 and 291,915.84

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Solution

The fourth proportional to 521,392.36, 719,354.16 and 291,915.84 is: 402,750.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,392.36 : 719,354.16 = 291,915.84 : x
  2. Step 2: Convert to fraction form
    521,392.36/719,354.16 = 291,915.84/x
  3. Step 3: Cross multiply
    521,392.36x = 719,354.16 × 291,915.84
  4. Step 4: Simplify right side
    521,392.36x = 209,990,873,873.89
  5. Step 5: Solve for x
    x = 209,990,873,873.89/521,392.36
  6. Step 6: Final answer
    x = 402,750.19

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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.