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Finding the Fourth Proportional to 672,291.10, 1,008,436.65 and 520,075.90

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Solution

The fourth proportional to 672,291.10, 1,008,436.65 and 520,075.90 is: 780,113.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,291.10 : 1,008,436.65 = 520,075.90 : x
  2. Step 2: Convert to fraction form
    672,291.10/1,008,436.65 = 520,075.90/x
  3. Step 3: Cross multiply
    672,291.10x = 1,008,436.65 × 520,075.90
  4. Step 4: Simplify right side
    672,291.10x = 524,463,598,341.74
  5. Step 5: Solve for x
    x = 524,463,598,341.74/672,291.10
  6. Step 6: Final answer
    x = 780,113.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.