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Finding the Fourth Proportional to 678,011.30, 935,593.74 and 402,321.63

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Solution

The fourth proportional to 678,011.30, 935,593.74 and 402,321.63 is: 555,167.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,011.30 : 935,593.74 = 402,321.63 : x
  2. Step 2: Convert to fraction form
    678,011.30/935,593.74 = 402,321.63/x
  3. Step 3: Cross multiply
    678,011.30x = 935,593.74 × 402,321.63
  4. Step 4: Simplify right side
    678,011.30x = 376,409,598,494.60
  5. Step 5: Solve for x
    x = 376,409,598,494.60/678,011.30
  6. Step 6: Final answer
    x = 555,167.15

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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.