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Finding the Fourth Proportional to 639,701.68, 960,132.90 and 340,434.24

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Solution

The fourth proportional to 639,701.68, 960,132.90 and 340,434.24 is: 510,960.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,701.68 : 960,132.90 = 340,434.24 : x
  2. Step 2: Convert to fraction form
    639,701.68/960,132.90 = 340,434.24/x
  3. Step 3: Cross multiply
    639,701.68x = 960,132.90 × 340,434.24
  4. Step 4: Simplify right side
    639,701.68x = 326,862,114,110.50
  5. Step 5: Solve for x
    x = 326,862,114,110.50/639,701.68
  6. Step 6: Final answer
    x = 510,960.22

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Double scale
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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.