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Finding the Fourth Proportional to 714,168.75, 985,481.10 and 427,681.47

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Solution

The fourth proportional to 714,168.75, 985,481.10 and 427,681.47 is: 590,157.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,168.75 : 985,481.10 = 427,681.47 : x
  2. Step 2: Convert to fraction form
    714,168.75/985,481.10 = 427,681.47/x
  3. Step 3: Cross multiply
    714,168.75x = 985,481.10 × 427,681.47
  4. Step 4: Simplify right side
    714,168.75x = 421,472,005,505.22
  5. Step 5: Solve for x
    x = 421,472,005,505.22/714,168.75
  6. Step 6: Final answer
    x = 590,157.45

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1.5x scale

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.