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Finding the Fourth Proportional to 978,034,499.80, 1,467,051,749.70 and 881,288,618.20

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Solution

The fourth proportional to 978,034,499.80, 1,467,051,749.70 and 881,288,618.20 is: 1,321,932,927.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,034,499.80 : 1,467,051,749.70 = 881,288,618.20 : x
  2. Step 2: Convert to fraction form
    978,034,499.80/1,467,051,749.70 = 881,288,618.20/x
  3. Step 3: Cross multiply
    978,034,499.80x = 1,467,051,749.70 × 881,288,618.20
  4. Step 4: Simplify right side
    978,034,499.80x = 1,292,896,009,321,005,312
  5. Step 5: Solve for x
    x = 1,292,896,009,321,005,312/978,034,499.80
  6. Step 6: Final answer
    x = 1,321,932,927.30

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1.5x scale

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.