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Finding the Fourth Proportional to 385,707.52, 578,779.98 and 208,210.60

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Solution

The fourth proportional to 385,707.52, 578,779.98 and 208,210.60 is: 312,433.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,707.52 : 578,779.98 = 208,210.60 : x
  2. Step 2: Convert to fraction form
    385,707.52/578,779.98 = 208,210.60/x
  3. Step 3: Cross multiply
    385,707.52x = 578,779.98 × 208,210.60
  4. Step 4: Simplify right side
    385,707.52x = 120,508,128,017.66
  5. Step 5: Solve for x
    x = 120,508,128,017.66/385,707.52
  6. Step 6: Final answer
    x = 312,433.96

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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.