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Finding the Fourth Proportional to 549,069.40, 822,000.30 and 391,605.40

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Solution

The fourth proportional to 549,069.40, 822,000.30 and 391,605.40 is: 586,264.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    549,069.40 : 822,000.30 = 391,605.40 : x
  2. Step 2: Convert to fraction form
    549,069.40/822,000.30 = 391,605.40/x
  3. Step 3: Cross multiply
    549,069.40x = 822,000.30 × 391,605.40
  4. Step 4: Simplify right side
    549,069.40x = 321,899,756,281.62
  5. Step 5: Solve for x
    x = 321,899,756,281.62/549,069.40
  6. Step 6: Final answer
    x = 586,264.24

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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.