Home / 430,478,672.40-645,718,008.60-389,664,003.60

Finding the Fourth Proportional to 430,478,672.40, 645,718,008.60 and 389,664,003.60

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Solution

The fourth proportional to 430,478,672.40, 645,718,008.60 and 389,664,003.60 is: 584,496,005.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,478,672.40 : 645,718,008.60 = 389,664,003.60 : x
  2. Step 2: Convert to fraction form
    430,478,672.40/645,718,008.60 = 389,664,003.60/x
  3. Step 3: Cross multiply
    430,478,672.40x = 645,718,008.60 × 389,664,003.60
  4. Step 4: Simplify right side
    430,478,672.40x = 251,613,064,427,695,264
  5. Step 5: Solve for x
    x = 251,613,064,427,695,264/430,478,672.40
  6. Step 6: Final answer
    x = 584,496,005.40

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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.