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Finding the Fourth Proportional to 639,075.40, 957,446.70 and 520,102.60

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Solution

The fourth proportional to 639,075.40, 957,446.70 and 520,102.60 is: 779,204.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,075.40 : 957,446.70 = 520,102.60 : x
  2. Step 2: Convert to fraction form
    639,075.40/957,446.70 = 520,102.60/x
  3. Step 3: Cross multiply
    639,075.40x = 957,446.70 × 520,102.60
  4. Step 4: Simplify right side
    639,075.40x = 497,970,518,031.42
  5. Step 5: Solve for x
    x = 497,970,518,031.42/639,075.40
  6. Step 6: Final answer
    x = 779,204.64

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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.