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Finding the Fourth Proportional to 879,855.68, 1,319,191.04 and 406,280

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Solution

The fourth proportional to 879,855.68, 1,319,191.04 and 406,280 is: 609,146.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,855.68 : 1,319,191.04 = 406,280 : x
  2. Step 2: Convert to fraction form
    879,855.68/1,319,191.04 = 406,280/x
  3. Step 3: Cross multiply
    879,855.68x = 1,319,191.04 × 406,280
  4. Step 4: Simplify right side
    879,855.68x = 535,960,935,731.20
  5. Step 5: Solve for x
    x = 535,960,935,731.20/879,855.68
  6. Step 6: Final answer
    x = 609,146.42

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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.