Home / 478,112,016.60-660,099,221.76-390,215,677.44

Finding the Fourth Proportional to 478,112,016.60, 660,099,221.76 and 390,215,677.44

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Solution

The fourth proportional to 478,112,016.60, 660,099,221.76 and 390,215,677.44 is: 538,746,268.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,112,016.60 : 660,099,221.76 = 390,215,677.44 : x
  2. Step 2: Convert to fraction form
    478,112,016.60/660,099,221.76 = 390,215,677.44/x
  3. Step 3: Cross multiply
    478,112,016.60x = 660,099,221.76 × 390,215,677.44
  4. Step 4: Simplify right side
    478,112,016.60x = 257,581,064,996,695,168
  5. Step 5: Solve for x
    x = 257,581,064,996,695,168/478,112,016.60
  6. Step 6: Final answer
    x = 538,746,268.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.