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Finding the Fourth Proportional to 1,312,312, 1,810,990.56 and 708,700

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Solution

The fourth proportional to 1,312,312, 1,810,990.56 and 708,700 is: 978,006

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,312 : 1,810,990.56 = 708,700 : x
  2. Step 2: Convert to fraction form
    1,312,312/1,810,990.56 = 708,700/x
  3. Step 3: Cross multiply
    1,312,312x = 1,810,990.56 × 708,700
  4. Step 4: Simplify right side
    1,312,312x = 1,283,449,009,872
  5. Step 5: Solve for x
    x = 1,283,449,009,872/1,312,312
  6. Step 6: Final answer
    x = 978,006

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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.