Home / 811,521,581.27-1,218,069,526.82-391,638,442.62

Finding the Fourth Proportional to 811,521,581.27, 1,218,069,526.82 and 391,638,442.62

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Solution

The fourth proportional to 811,521,581.27, 1,218,069,526.82 and 391,638,442.62 is: 587,837,543.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,521,581.27 : 1,218,069,526.82 = 391,638,442.62 : x
  2. Step 2: Convert to fraction form
    811,521,581.27/1,218,069,526.82 = 391,638,442.62/x
  3. Step 3: Cross multiply
    811,521,581.27x = 1,218,069,526.82 × 391,638,442.62
  4. Step 4: Simplify right side
    811,521,581.27x = 477,042,852,484,706,944
  5. Step 5: Solve for x
    x = 477,042,852,484,706,944/811,521,581.27
  6. Step 6: Final answer
    x = 587,837,543.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.