Home / 1,139,428.80-1,709,402.40-665,870.40

Finding the Fourth Proportional to 1,139,428.80, 1,709,402.40 and 665,870.40

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Solution

The fourth proportional to 1,139,428.80, 1,709,402.40 and 665,870.40 is: 998,957.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139,428.80 : 1,709,402.40 = 665,870.40 : x
  2. Step 2: Convert to fraction form
    1,139,428.80/1,709,402.40 = 665,870.40/x
  3. Step 3: Cross multiply
    1,139,428.80x = 1,709,402.40 × 665,870.40
  4. Step 4: Simplify right side
    1,139,428.80x = 1,138,240,459,848.96
  5. Step 5: Solve for x
    x = 1,138,240,459,848.96/1,139,428.80
  6. Step 6: Final answer
    x = 998,957.07

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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.