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Finding the Fourth Proportional to 581,642.90, 872,003.55 and 318,986.90

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Solution

The fourth proportional to 581,642.90, 872,003.55 and 318,986.90 is: 478,227.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,642.90 : 872,003.55 = 318,986.90 : x
  2. Step 2: Convert to fraction form
    581,642.90/872,003.55 = 318,986.90/x
  3. Step 3: Cross multiply
    581,642.90x = 872,003.55 × 318,986.90
  4. Step 4: Simplify right side
    581,642.90x = 278,157,709,203.50
  5. Step 5: Solve for x
    x = 278,157,709,203.50/581,642.90
  6. Step 6: Final answer
    x = 478,227.64

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1.5x scale

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.