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Finding the Fourth Proportional to 635,690.19, 877,482.66 and 420,899.45

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Solution

The fourth proportional to 635,690.19, 877,482.66 and 420,899.45 is: 580,993.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    635,690.19 : 877,482.66 = 420,899.45 : x
  2. Step 2: Convert to fraction form
    635,690.19/877,482.66 = 420,899.45/x
  3. Step 3: Cross multiply
    635,690.19x = 877,482.66 × 420,899.45
  4. Step 4: Simplify right side
    635,690.19x = 369,331,971,172.24
  5. Step 5: Solve for x
    x = 369,331,971,172.24/635,690.19
  6. Step 6: Final answer
    x = 580,993.66

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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.