Home / 819,376,209.20-1,229,064,313.80-805,771,319.60

Finding the Fourth Proportional to 819,376,209.20, 1,229,064,313.80 and 805,771,319.60

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Solution

The fourth proportional to 819,376,209.20, 1,229,064,313.80 and 805,771,319.60 is: 1,208,656,979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,376,209.20 : 1,229,064,313.80 = 805,771,319.60 : x
  2. Step 2: Convert to fraction form
    819,376,209.20/1,229,064,313.80 = 805,771,319.60/x
  3. Step 3: Cross multiply
    819,376,209.20x = 1,229,064,313.80 × 805,771,319.60
  4. Step 4: Simplify right side
    819,376,209.20x = 990,344,774,003,894,528
  5. Step 5: Solve for x
    x = 990,344,774,003,894,528/819,376,209.20
  6. Step 6: Final answer
    x = 1,208,656,979.40

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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.