Home / 1,312,420.13-1,811,139.78-708,808.13

Finding the Fourth Proportional to 1,312,420.13, 1,811,139.78 and 708,808.13

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Solution

The fourth proportional to 1,312,420.13, 1,811,139.78 and 708,808.13 is: 978,155.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,420.13 : 1,811,139.78 = 708,808.13 : x
  2. Step 2: Convert to fraction form
    1,312,420.13/1,811,139.78 = 708,808.13/x
  3. Step 3: Cross multiply
    1,312,420.13x = 1,811,139.78 × 708,808.13
  4. Step 4: Simplify right side
    1,312,420.13x = 1,283,750,591,574.71
  5. Step 5: Solve for x
    x = 1,283,750,591,574.71/1,312,420.13
  6. Step 6: Final answer
    x = 978,155.22

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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.