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Finding the Fourth Proportional to 551,675.35, 761,312.65 and 309,957.78

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Solution

The fourth proportional to 551,675.35, 761,312.65 and 309,957.78 is: 427,742.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,675.35 : 761,312.65 = 309,957.78 : x
  2. Step 2: Convert to fraction form
    551,675.35/761,312.65 = 309,957.78/x
  3. Step 3: Cross multiply
    551,675.35x = 761,312.65 × 309,957.78
  4. Step 4: Simplify right side
    551,675.35x = 235,974,778,879.92
  5. Step 5: Solve for x
    x = 235,974,778,879.92/551,675.35
  6. Step 6: Final answer
    x = 427,742.11

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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.