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Finding the Fourth Proportional to 554,415.40, 831,428.70 and 288,087.40

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Solution

The fourth proportional to 554,415.40, 831,428.70 and 288,087.40 is: 432,030.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,415.40 : 831,428.70 = 288,087.40 : x
  2. Step 2: Convert to fraction form
    554,415.40/831,428.70 = 288,087.40/x
  3. Step 3: Cross multiply
    554,415.40x = 831,428.70 × 288,087.40
  4. Step 4: Simplify right side
    554,415.40x = 239,524,132,468.38
  5. Step 5: Solve for x
    x = 239,524,132,468.38/554,415.40
  6. Step 6: Final answer
    x = 432,030.09

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1.5x scale

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.