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Finding the Fourth Proportional to 1,312,823.52, 1,811,671.20 and 739,852.20

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Solution

The fourth proportional to 1,312,823.52, 1,811,671.20 and 739,852.20 is: 1,020,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,823.52 : 1,811,671.20 = 739,852.20 : x
  2. Step 2: Convert to fraction form
    1,312,823.52/1,811,671.20 = 739,852.20/x
  3. Step 3: Cross multiply
    1,312,823.52x = 1,811,671.20 × 739,852.20
  4. Step 4: Simplify right side
    1,312,823.52x = 1,340,368,922,996.64
  5. Step 5: Solve for x
    x = 1,340,368,922,996.64/1,312,823.52
  6. Step 6: Final answer
    x = 1,020,981.80

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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.