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Finding the Fourth Proportional to 678,036.18, 935,628.03 and 402,346.51

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Solution

The fourth proportional to 678,036.18, 935,628.03 and 402,346.51 is: 555,201.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,036.18 : 935,628.03 = 402,346.51 : x
  2. Step 2: Convert to fraction form
    678,036.18/935,628.03 = 402,346.51/x
  3. Step 3: Cross multiply
    678,036.18x = 935,628.03 × 402,346.51
  4. Step 4: Simplify right side
    678,036.18x = 376,446,672,528.68
  5. Step 5: Solve for x
    x = 376,446,672,528.68/678,036.18
  6. Step 6: Final answer
    x = 555,201.45

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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.