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Finding the Fourth Proportional to 867,725.60, 1,302,428 and 418,762.52

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Solution

The fourth proportional to 867,725.60, 1,302,428 and 418,762.52 is: 628,548.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,725.60 : 1,302,428 = 418,762.52 : x
  2. Step 2: Convert to fraction form
    867,725.60/1,302,428 = 418,762.52/x
  3. Step 3: Cross multiply
    867,725.60x = 1,302,428 × 418,762.52
  4. Step 4: Simplify right side
    867,725.60x = 545,408,031,398.56
  5. Step 5: Solve for x
    x = 545,408,031,398.56/867,725.60
  6. Step 6: Final answer
    x = 628,548.97

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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.