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Finding the Fourth Proportional to 662,270.40, 993,612.96 and 425,880

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Solution

The fourth proportional to 662,270.40, 993,612.96 and 425,880 is: 638,953.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,270.40 : 993,612.96 = 425,880 : x
  2. Step 2: Convert to fraction form
    662,270.40/993,612.96 = 425,880/x
  3. Step 3: Cross multiply
    662,270.40x = 993,612.96 × 425,880
  4. Step 4: Simplify right side
    662,270.40x = 423,159,887,404.80
  5. Step 5: Solve for x
    x = 423,159,887,404.80/662,270.40
  6. Step 6: Final answer
    x = 638,953.35

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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.