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Finding the Fourth Proportional to 406,000.30, 609,000.45 and 386,646.70

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Solution

The fourth proportional to 406,000.30, 609,000.45 and 386,646.70 is: 579,970.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,000.30 : 609,000.45 = 386,646.70 : x
  2. Step 2: Convert to fraction form
    406,000.30/609,000.45 = 386,646.70/x
  3. Step 3: Cross multiply
    406,000.30x = 609,000.45 × 386,646.70
  4. Step 4: Simplify right side
    406,000.30x = 235,468,014,291.02
  5. Step 5: Solve for x
    x = 235,468,014,291.02/406,000.30
  6. Step 6: Final answer
    x = 579,970.05

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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.