Home / 630,555.10-869,938.58-485,405.26

Finding the Fourth Proportional to 630,555.10, 869,938.58 and 485,405.26

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Solution

The fourth proportional to 630,555.10, 869,938.58 and 485,405.26 is: 669,684.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,555.10 : 869,938.58 = 485,405.26 : x
  2. Step 2: Convert to fraction form
    630,555.10/869,938.58 = 485,405.26/x
  3. Step 3: Cross multiply
    630,555.10x = 869,938.58 × 485,405.26
  4. Step 4: Simplify right side
    630,555.10x = 422,272,761,647.60
  5. Step 5: Solve for x
    x = 422,272,761,647.60/630,555.10
  6. Step 6: Final answer
    x = 669,684.16

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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.