Home / 645,936.66-891,354.42-373,985.10

Finding the Fourth Proportional to 645,936.66, 891,354.42 and 373,985.10

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Solution

The fourth proportional to 645,936.66, 891,354.42 and 373,985.10 is: 516,077.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,936.66 : 891,354.42 = 373,985.10 : x
  2. Step 2: Convert to fraction form
    645,936.66/891,354.42 = 373,985.10/x
  3. Step 3: Cross multiply
    645,936.66x = 891,354.42 × 373,985.10
  4. Step 4: Simplify right side
    645,936.66x = 333,353,271,899.14
  5. Step 5: Solve for x
    x = 333,353,271,899.14/645,936.66
  6. Step 6: Final answer
    x = 516,077.34

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Double scale
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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.