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Finding the Fourth Proportional to 806,978.80, 1,210,468.20 and 527,042.80

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Solution

The fourth proportional to 806,978.80, 1,210,468.20 and 527,042.80 is: 790,564.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,978.80 : 1,210,468.20 = 527,042.80 : x
  2. Step 2: Convert to fraction form
    806,978.80/1,210,468.20 = 527,042.80/x
  3. Step 3: Cross multiply
    806,978.80x = 1,210,468.20 × 527,042.80
  4. Step 4: Simplify right side
    806,978.80x = 637,968,549,438.96
  5. Step 5: Solve for x
    x = 637,968,549,438.96/806,978.80
  6. Step 6: Final answer
    x = 790,564.20

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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.