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Finding the Fourth Proportional to 520,457.93, 718,192.39 and 316,480.69

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Solution

The fourth proportional to 520,457.93, 718,192.39 and 316,480.69 is: 436,719.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,457.93 : 718,192.39 = 316,480.69 : x
  2. Step 2: Convert to fraction form
    520,457.93/718,192.39 = 316,480.69/x
  3. Step 3: Cross multiply
    520,457.93x = 718,192.39 × 316,480.69
  4. Step 4: Simplify right side
    520,457.93x = 227,294,023,139.95
  5. Step 5: Solve for x
    x = 227,294,023,139.95/520,457.93
  6. Step 6: Final answer
    x = 436,719.30

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Half scale
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Double scale
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Similar ratio
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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.