Home / 687,916.80-1,031,881.68-208,148.40

Finding the Fourth Proportional to 687,916.80, 1,031,881.68 and 208,148.40

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Solution

The fourth proportional to 687,916.80, 1,031,881.68 and 208,148.40 is: 312,224.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,916.80 : 1,031,881.68 = 208,148.40 : x
  2. Step 2: Convert to fraction form
    687,916.80/1,031,881.68 = 208,148.40/x
  3. Step 3: Cross multiply
    687,916.80x = 1,031,881.68 × 208,148.40
  4. Step 4: Simplify right side
    687,916.80x = 214,784,520,681.31
  5. Step 5: Solve for x
    x = 214,784,520,681.31/687,916.80
  6. Step 6: Final answer
    x = 312,224.56

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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.