Home / 878,690,040.30-1,318,035,060.45-780,054,590.70

Finding the Fourth Proportional to 878,690,040.30, 1,318,035,060.45 and 780,054,590.70

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Solution

The fourth proportional to 878,690,040.30, 1,318,035,060.45 and 780,054,590.70 is: 1,170,081,886.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,690,040.30 : 1,318,035,060.45 = 780,054,590.70 : x
  2. Step 2: Convert to fraction form
    878,690,040.30/1,318,035,060.45 = 780,054,590.70/x
  3. Step 3: Cross multiply
    878,690,040.30x = 1,318,035,060.45 × 780,054,590.70
  4. Step 4: Simplify right side
    878,690,040.30x = 1,028,139,299,607,574,656
  5. Step 5: Solve for x
    x = 1,028,139,299,607,574,656/878,690,040.30
  6. Step 6: Final answer
    x = 1,170,081,886.05

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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.