Home / 319,091.40-478,637.10-213,337.80

Finding the Fourth Proportional to 319,091.40, 478,637.10 and 213,337.80

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Solution

The fourth proportional to 319,091.40, 478,637.10 and 213,337.80 is: 320,006.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,091.40 : 478,637.10 = 213,337.80 : x
  2. Step 2: Convert to fraction form
    319,091.40/478,637.10 = 213,337.80/x
  3. Step 3: Cross multiply
    319,091.40x = 478,637.10 × 213,337.80
  4. Step 4: Simplify right side
    319,091.40x = 102,111,385,912.38
  5. Step 5: Solve for x
    x = 102,111,385,912.38/319,091.40
  6. Step 6: Final answer
    x = 320,006.70

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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.