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Finding the Fourth Proportional to 538,421.40, 807,632.10 and 370,459.80

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Solution

The fourth proportional to 538,421.40, 807,632.10 and 370,459.80 is: 555,689.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,421.40 : 807,632.10 = 370,459.80 : x
  2. Step 2: Convert to fraction form
    538,421.40/807,632.10 = 370,459.80/x
  3. Step 3: Cross multiply
    538,421.40x = 807,632.10 × 370,459.80
  4. Step 4: Simplify right side
    538,421.40x = 299,195,226,239.58
  5. Step 5: Solve for x
    x = 299,195,226,239.58/538,421.40
  6. Step 6: Final answer
    x = 555,689.70

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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.