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Finding the Fourth Proportional to 612,441.66, 918,849.12 and 313,132.38

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Solution

The fourth proportional to 612,441.66, 918,849.12 and 313,132.38 is: 469,793.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,441.66 : 918,849.12 = 313,132.38 : x
  2. Step 2: Convert to fraction form
    612,441.66/918,849.12 = 313,132.38/x
  3. Step 3: Cross multiply
    612,441.66x = 918,849.12 × 313,132.38
  4. Step 4: Simplify right side
    612,441.66x = 287,721,411,806.51
  5. Step 5: Solve for x
    x = 287,721,411,806.51/612,441.66
  6. Step 6: Final answer
    x = 469,793.99

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1.5x scale

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.