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Finding the Fourth Proportional to 521,385.88, 719,509.98 and 282,921.88

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Solution

The fourth proportional to 521,385.88, 719,509.98 and 282,921.88 is: 390,430.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,385.88 : 719,509.98 = 282,921.88 : x
  2. Step 2: Convert to fraction form
    521,385.88/719,509.98 = 282,921.88/x
  3. Step 3: Cross multiply
    521,385.88x = 719,509.98 × 282,921.88
  4. Step 4: Simplify right side
    521,385.88x = 203,565,116,220.36
  5. Step 5: Solve for x
    x = 203,565,116,220.36/521,385.88
  6. Step 6: Final answer
    x = 390,430.82

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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.