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Finding the Fourth Proportional to 368,985.60, 553,402.80 and 102,679.20

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Solution

The fourth proportional to 368,985.60, 553,402.80 and 102,679.20 is: 153,997.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,985.60 : 553,402.80 = 102,679.20 : x
  2. Step 2: Convert to fraction form
    368,985.60/553,402.80 = 102,679.20/x
  3. Step 3: Cross multiply
    368,985.60x = 553,402.80 × 102,679.20
  4. Step 4: Simplify right side
    368,985.60x = 56,822,956,781.76
  5. Step 5: Solve for x
    x = 56,822,956,781.76/368,985.60
  6. Step 6: Final answer
    x = 153,997.76

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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.