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Finding the Fourth Proportional to 627,823,247.69, 866,549,849.83 and 486,414,769.21

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Solution

The fourth proportional to 627,823,247.69, 866,549,849.83 and 486,414,769.21 is: 671,371,515.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,823,247.69 : 866,549,849.83 = 486,414,769.21 : x
  2. Step 2: Convert to fraction form
    627,823,247.69/866,549,849.83 = 486,414,769.21/x
  3. Step 3: Cross multiply
    627,823,247.69x = 866,549,849.83 × 486,414,769.21
  4. Step 4: Simplify right side
    627,823,247.69x = 421,502,645,210,637,184
  5. Step 5: Solve for x
    x = 421,502,645,210,637,184/627,823,247.69
  6. Step 6: Final answer
    x = 671,371,515.41

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1.5x scale

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.