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Finding the Fourth Proportional to 437,141.80, 655,712.70 and 430,143.40

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Solution

The fourth proportional to 437,141.80, 655,712.70 and 430,143.40 is: 645,215.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,141.80 : 655,712.70 = 430,143.40 : x
  2. Step 2: Convert to fraction form
    437,141.80/655,712.70 = 430,143.40/x
  3. Step 3: Cross multiply
    437,141.80x = 655,712.70 × 430,143.40
  4. Step 4: Simplify right side
    437,141.80x = 282,050,490,201.18
  5. Step 5: Solve for x
    x = 282,050,490,201.18/437,141.80
  6. Step 6: Final answer
    x = 645,215.10

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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.