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Finding the Fourth Proportional to 520,420.09, 718,207.13 and 316,437.23

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Solution

The fourth proportional to 520,420.09, 718,207.13 and 316,437.23 is: 436,700.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,420.09 : 718,207.13 = 316,437.23 : x
  2. Step 2: Convert to fraction form
    520,420.09/718,207.13 = 316,437.23/x
  3. Step 3: Cross multiply
    520,420.09x = 718,207.13 × 316,437.23
  4. Step 4: Simplify right side
    520,420.09x = 227,267,471,983.51
  5. Step 5: Solve for x
    x = 227,267,471,983.51/520,420.09
  6. Step 6: Final answer
    x = 436,700.04

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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.