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Finding the Fourth Proportional to 890,352,012.90, 1,335,528,019.35 and 791,716,563.30

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Solution

The fourth proportional to 890,352,012.90, 1,335,528,019.35 and 791,716,563.30 is: 1,187,574,844.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,352,012.90 : 1,335,528,019.35 = 791,716,563.30 : x
  2. Step 2: Convert to fraction form
    890,352,012.90/1,335,528,019.35 = 791,716,563.30/x
  3. Step 3: Cross multiply
    890,352,012.90x = 1,335,528,019.35 × 791,716,563.30
  4. Step 4: Simplify right side
    890,352,012.90x = 1,057,359,653,670,637,824
  5. Step 5: Solve for x
    x = 1,057,359,653,670,637,824/890,352,012.90
  6. Step 6: Final answer
    x = 1,187,574,844.95

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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.