Home / 847,971.45-1,271,957.90-315,423.45

Finding the Fourth Proportional to 847,971.45, 1,271,957.90 and 315,423.45

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Solution

The fourth proportional to 847,971.45, 1,271,957.90 and 315,423.45 is: 473,135.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    847,971.45 : 1,271,957.90 = 315,423.45 : x
  2. Step 2: Convert to fraction form
    847,971.45/1,271,957.90 = 315,423.45/x
  3. Step 3: Cross multiply
    847,971.45x = 1,271,957.90 × 315,423.45
  4. Step 4: Simplify right side
    847,971.45x = 401,205,347,495.64
  5. Step 5: Solve for x
    x = 401,205,347,495.64/847,971.45
  6. Step 6: Final answer
    x = 473,135.44

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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.