Home / 612,428.45-918,829.47-313,119.15

Finding the Fourth Proportional to 612,428.45, 918,829.47 and 313,119.15

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Solution

The fourth proportional to 612,428.45, 918,829.47 and 313,119.15 is: 469,774.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,428.45 : 918,829.47 = 313,119.15 : x
  2. Step 2: Convert to fraction form
    612,428.45/918,829.47 = 313,119.15/x
  3. Step 3: Cross multiply
    612,428.45x = 918,829.47 × 313,119.15
  4. Step 4: Simplify right side
    612,428.45x = 287,703,102,641.35
  5. Step 5: Solve for x
    x = 287,703,102,641.35/612,428.45
  6. Step 6: Final answer
    x = 469,774.23

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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.