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Finding the Fourth Proportional to 435,156.40, 649,756.51 and 389,885.50

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Solution

The fourth proportional to 435,156.40, 649,756.51 and 389,885.50 is: 582,159.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    435,156.40 : 649,756.51 = 389,885.50 : x
  2. Step 2: Convert to fraction form
    435,156.40/649,756.51 = 389,885.50/x
  3. Step 3: Cross multiply
    435,156.40x = 649,756.51 × 389,885.50
  4. Step 4: Simplify right side
    435,156.40x = 253,330,642,713.64
  5. Step 5: Solve for x
    x = 253,330,642,713.64/435,156.40
  6. Step 6: Final answer
    x = 582,159.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.