Home / 912,985.40-1,369,478.10-439,556.60

Finding the Fourth Proportional to 912,985.40, 1,369,478.10 and 439,556.60

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Solution

The fourth proportional to 912,985.40, 1,369,478.10 and 439,556.60 is: 659,334.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,985.40 : 1,369,478.10 = 439,556.60 : x
  2. Step 2: Convert to fraction form
    912,985.40/1,369,478.10 = 439,556.60/x
  3. Step 3: Cross multiply
    912,985.40x = 1,369,478.10 × 439,556.60
  4. Step 4: Simplify right side
    912,985.40x = 601,963,137,410.46
  5. Step 5: Solve for x
    x = 601,963,137,410.46/912,985.40
  6. Step 6: Final answer
    x = 659,334.90

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Double scale
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Similar ratio
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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.