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Finding the Fourth Proportional to 564,637.70, 779,190.33 and 309,987.07

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Solution

The fourth proportional to 564,637.70, 779,190.33 and 309,987.07 is: 427,776.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,637.70 : 779,190.33 = 309,987.07 : x
  2. Step 2: Convert to fraction form
    564,637.70/779,190.33 = 309,987.07/x
  3. Step 3: Cross multiply
    564,637.70x = 779,190.33 × 309,987.07
  4. Step 4: Simplify right side
    564,637.70x = 241,538,926,583.51
  5. Step 5: Solve for x
    x = 241,538,926,583.51/564,637.70
  6. Step 6: Final answer
    x = 427,776.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.