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Finding the Fourth Proportional to 709,764.72, 979,457.40 and 387,484.08

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Solution

The fourth proportional to 709,764.72, 979,457.40 and 387,484.08 is: 534,718.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,764.72 : 979,457.40 = 387,484.08 : x
  2. Step 2: Convert to fraction form
    709,764.72/979,457.40 = 387,484.08/x
  3. Step 3: Cross multiply
    709,764.72x = 979,457.40 × 387,484.08
  4. Step 4: Simplify right side
    709,764.72x = 379,524,149,538.19
  5. Step 5: Solve for x
    x = 379,524,149,538.19/709,764.72
  6. Step 6: Final answer
    x = 534,718.25

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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.