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Finding the Fourth Proportional to 521,371.88, 719,490.66 and 282,907.88

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Solution

The fourth proportional to 521,371.88, 719,490.66 and 282,907.88 is: 390,411.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,371.88 : 719,490.66 = 282,907.88 : x
  2. Step 2: Convert to fraction form
    521,371.88/719,490.66 = 282,907.88/x
  3. Step 3: Cross multiply
    521,371.88x = 719,490.66 × 282,907.88
  4. Step 4: Simplify right side
    521,371.88x = 203,549,577,300.40
  5. Step 5: Solve for x
    x = 203,549,577,300.40/521,371.88
  6. Step 6: Final answer
    x = 390,411.50

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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.