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Finding the Fourth Proportional to 665,534.88, 918,417.60 and 379,095.84

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Solution

The fourth proportional to 665,534.88, 918,417.60 and 379,095.84 is: 523,140.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,534.88 : 918,417.60 = 379,095.84 : x
  2. Step 2: Convert to fraction form
    665,534.88/918,417.60 = 379,095.84/x
  3. Step 3: Cross multiply
    665,534.88x = 918,417.60 × 379,095.84
  4. Step 4: Simplify right side
    665,534.88x = 348,168,291,542.78
  5. Step 5: Solve for x
    x = 348,168,291,542.78/665,534.88
  6. Step 6: Final answer
    x = 523,140.56

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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.