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Finding the Fourth Proportional to 891,254,782.80, 1,335,606,715.80 and 656,251,572.60

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Solution

The fourth proportional to 891,254,782.80, 1,335,606,715.80 and 656,251,572.60 is: 983,438,209.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,254,782.80 : 1,335,606,715.80 = 656,251,572.60 : x
  2. Step 2: Convert to fraction form
    891,254,782.80/1,335,606,715.80 = 656,251,572.60/x
  3. Step 3: Cross multiply
    891,254,782.80x = 1,335,606,715.80 × 656,251,572.60
  4. Step 4: Simplify right side
    891,254,782.80x = 876,494,007,618,871,296
  5. Step 5: Solve for x
    x = 876,494,007,618,871,296/891,254,782.80
  6. Step 6: Final answer
    x = 983,438,209.29

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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.