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Finding the Fourth Proportional to 587,210.60, 810,354.70 and 318,938.60

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Solution

The fourth proportional to 587,210.60, 810,354.70 and 318,938.60 is: 440,137.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,210.60 : 810,354.70 = 318,938.60 : x
  2. Step 2: Convert to fraction form
    587,210.60/810,354.70 = 318,938.60/x
  3. Step 3: Cross multiply
    587,210.60x = 810,354.70 × 318,938.60
  4. Step 4: Simplify right side
    587,210.60x = 258,453,393,521.42
  5. Step 5: Solve for x
    x = 258,453,393,521.42/587,210.60
  6. Step 6: Final answer
    x = 440,137.48

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1.5x scale

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.