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Finding the Fourth Proportional to 1,312,653.47, 1,811,451.02 and 731,869.70

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Solution

The fourth proportional to 1,312,653.47, 1,811,451.02 and 731,869.70 is: 1,009,974.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,653.47 : 1,811,451.02 = 731,869.70 : x
  2. Step 2: Convert to fraction form
    1,312,653.47/1,811,451.02 = 731,869.70/x
  3. Step 3: Cross multiply
    1,312,653.47x = 1,811,451.02 × 731,869.70
  4. Step 4: Simplify right side
    1,312,653.47x = 1,325,746,101,855.49
  5. Step 5: Solve for x
    x = 1,325,746,101,855.49/1,312,653.47
  6. Step 6: Final answer
    x = 1,009,974.18

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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.