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Finding the Fourth Proportional to 1,309,627,518.80, 1,807,328,751.40 and 714,943,712.88

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Solution

The fourth proportional to 1,309,627,518.80, 1,807,328,751.40 and 714,943,712.88 is: 986,645,675.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309,627,518.80 : 1,807,328,751.40 = 714,943,712.88 : x
  2. Step 2: Convert to fraction form
    1,309,627,518.80/1,807,328,751.40 = 714,943,712.88/x
  3. Step 3: Cross multiply
    1,309,627,518.80x = 1,807,328,751.40 × 714,943,712.88
  4. Step 4: Simplify right side
    1,309,627,518.80x = 1,292,138,327,920,690,432
  5. Step 5: Solve for x
    x = 1,292,138,327,920,690,432/1,309,627,518.80
  6. Step 6: Final answer
    x = 986,645,675.49

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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.