Home / 821,005,558.40-1,229,791,396.80-384,678,646.40

Finding the Fourth Proportional to 821,005,558.40, 1,229,791,396.80 and 384,678,646.40

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Solution

The fourth proportional to 821,005,558.40, 1,229,791,396.80 and 384,678,646.40 is: 576,213,504.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,005,558.40 : 1,229,791,396.80 = 384,678,646.40 : x
  2. Step 2: Convert to fraction form
    821,005,558.40/1,229,791,396.80 = 384,678,646.40/x
  3. Step 3: Cross multiply
    821,005,558.40x = 1,229,791,396.80 × 384,678,646.40
  4. Step 4: Simplify right side
    821,005,558.40x = 473,074,489,875,389,248
  5. Step 5: Solve for x
    x = 473,074,489,875,389,248/821,005,558.40
  6. Step 6: Final answer
    x = 576,213,504.32

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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.