Home / 1,427,312.61-1,969,509.90-815,505

Finding the Fourth Proportional to 1,427,312.61, 1,969,509.90 and 815,505

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Solution

The fourth proportional to 1,427,312.61, 1,969,509.90 and 815,505 is: 1,125,293.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427,312.61 : 1,969,509.90 = 815,505 : x
  2. Step 2: Convert to fraction form
    1,427,312.61/1,969,509.90 = 815,505/x
  3. Step 3: Cross multiply
    1,427,312.61x = 1,969,509.90 × 815,505
  4. Step 4: Simplify right side
    1,427,312.61x = 1,606,145,170,999.50
  5. Step 5: Solve for x
    x = 1,606,145,170,999.50/1,427,312.61
  6. Step 6: Final answer
    x = 1,125,293.20

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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.