Home / 687,907.40-1,032,006.90-208,095.80

Finding the Fourth Proportional to 687,907.40, 1,032,006.90 and 208,095.80

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Solution

The fourth proportional to 687,907.40, 1,032,006.90 and 208,095.80 is: 312,187.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,907.40 : 1,032,006.90 = 208,095.80 : x
  2. Step 2: Convert to fraction form
    687,907.40/1,032,006.90 = 208,095.80/x
  3. Step 3: Cross multiply
    687,907.40x = 1,032,006.90 × 208,095.80
  4. Step 4: Simplify right side
    687,907.40x = 214,756,301,461.02
  5. Step 5: Solve for x
    x = 214,756,301,461.02/687,907.40
  6. Step 6: Final answer
    x = 312,187.81

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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.