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Finding the Fourth Proportional to 1,315,700.08, 1,815,681.26 and 771,845.13

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Solution

The fourth proportional to 1,315,700.08, 1,815,681.26 and 771,845.13 is: 1,065,155.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,700.08 : 1,815,681.26 = 771,845.13 : x
  2. Step 2: Convert to fraction form
    1,315,700.08/1,815,681.26 = 771,845.13/x
  3. Step 3: Cross multiply
    1,315,700.08x = 1,815,681.26 × 771,845.13
  4. Step 4: Simplify right side
    1,315,700.08x = 1,401,424,740,092.88
  5. Step 5: Solve for x
    x = 1,401,424,740,092.88/1,315,700.08
  6. Step 6: Final answer
    x = 1,065,155.17

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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.