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Finding the Fourth Proportional to 543,762.60, 815,643.90 and 457,157.40

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Solution

The fourth proportional to 543,762.60, 815,643.90 and 457,157.40 is: 685,736.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,762.60 : 815,643.90 = 457,157.40 : x
  2. Step 2: Convert to fraction form
    543,762.60/815,643.90 = 457,157.40/x
  3. Step 3: Cross multiply
    543,762.60x = 815,643.90 × 457,157.40
  4. Step 4: Simplify right side
    543,762.60x = 372,877,644,649.86
  5. Step 5: Solve for x
    x = 372,877,644,649.86/543,762.60
  6. Step 6: Final answer
    x = 685,736.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.