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Finding the Fourth Proportional to 678,030.12, 935,619.63 and 402,340.44

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Solution

The fourth proportional to 678,030.12, 935,619.63 and 402,340.44 is: 555,193.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,030.12 : 935,619.63 = 402,340.44 : x
  2. Step 2: Convert to fraction form
    678,030.12/935,619.63 = 402,340.44/x
  3. Step 3: Cross multiply
    678,030.12x = 935,619.63 × 402,340.44
  4. Step 4: Simplify right side
    678,030.12x = 376,437,613,606.84
  5. Step 5: Solve for x
    x = 376,437,613,606.84/678,030.12
  6. Step 6: Final answer
    x = 555,193.05

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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.