Home / 1,212,507.80-1,818,761.70-999,931.40

Finding the Fourth Proportional to 1,212,507.80, 1,818,761.70 and 999,931.40

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Solution

The fourth proportional to 1,212,507.80, 1,818,761.70 and 999,931.40 is: 1,499,897.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,507.80 : 1,818,761.70 = 999,931.40 : x
  2. Step 2: Convert to fraction form
    1,212,507.80/1,818,761.70 = 999,931.40/x
  3. Step 3: Cross multiply
    1,212,507.80x = 1,818,761.70 × 999,931.40
  4. Step 4: Simplify right side
    1,212,507.80x = 1,818,636,932,947.38
  5. Step 5: Solve for x
    x = 1,818,636,932,947.38/1,212,507.80
  6. Step 6: Final answer
    x = 1,499,897.10

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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.