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Finding the Fourth Proportional to 520,521.15, 718,314.22 and 291,075.81

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Solution

The fourth proportional to 520,521.15, 718,314.22 and 291,075.81 is: 401,681.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,521.15 : 718,314.22 = 291,075.81 : x
  2. Step 2: Convert to fraction form
    520,521.15/718,314.22 = 291,075.81/x
  3. Step 3: Cross multiply
    520,521.15x = 718,314.22 × 291,075.81
  4. Step 4: Simplify right side
    520,521.15x = 209,083,893,421.02
  5. Step 5: Solve for x
    x = 209,083,893,421.02/520,521.15
  6. Step 6: Final answer
    x = 401,681.84

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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.