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Finding the Fourth Proportional to 665,048.20, 995,498.70 and 644,312.20

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Solution

The fourth proportional to 665,048.20, 995,498.70 and 644,312.20 is: 964,459.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,048.20 : 995,498.70 = 644,312.20 : x
  2. Step 2: Convert to fraction form
    665,048.20/995,498.70 = 644,312.20/x
  3. Step 3: Cross multiply
    665,048.20x = 995,498.70 × 644,312.20
  4. Step 4: Simplify right side
    665,048.20x = 641,411,957,494.14
  5. Step 5: Solve for x
    x = 641,411,957,494.14/665,048.20
  6. Step 6: Final answer
    x = 964,459.35

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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.