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Finding the Fourth Proportional to 674,497.37, 931,219.30 and 642,128.40

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Solution

The fourth proportional to 674,497.37, 931,219.30 and 642,128.40 is: 886,530.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,497.37 : 931,219.30 = 642,128.40 : x
  2. Step 2: Convert to fraction form
    674,497.37/931,219.30 = 642,128.40/x
  3. Step 3: Cross multiply
    674,497.37x = 931,219.30 × 642,128.40
  4. Step 4: Simplify right side
    674,497.37x = 597,962,359,158.12
  5. Step 5: Solve for x
    x = 597,962,359,158.12/674,497.37
  6. Step 6: Final answer
    x = 886,530.31

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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.