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Finding the Fourth Proportional to 519,237.54, 716,436.60 and 390,313.89

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Solution

The fourth proportional to 519,237.54, 716,436.60 and 390,313.89 is: 538,549.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,237.54 : 716,436.60 = 390,313.89 : x
  2. Step 2: Convert to fraction form
    519,237.54/716,436.60 = 390,313.89/x
  3. Step 3: Cross multiply
    519,237.54x = 716,436.60 × 390,313.89
  4. Step 4: Simplify right side
    519,237.54x = 279,635,154,820.70
  5. Step 5: Solve for x
    x = 279,635,154,820.70/519,237.54
  6. Step 6: Final answer
    x = 538,549.57

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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.