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Finding the Fourth Proportional to 442,866,205.40, 664,299,308.10 and 212,779,808.60

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Solution

The fourth proportional to 442,866,205.40, 664,299,308.10 and 212,779,808.60 is: 319,169,712.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,866,205.40 : 664,299,308.10 = 212,779,808.60 : x
  2. Step 2: Convert to fraction form
    442,866,205.40/664,299,308.10 = 212,779,808.60/x
  3. Step 3: Cross multiply
    442,866,205.40x = 664,299,308.10 × 212,779,808.60
  4. Step 4: Simplify right side
    442,866,205.40x = 141,349,479,630,630,432
  5. Step 5: Solve for x
    x = 141,349,479,630,630,432/442,866,205.40
  6. Step 6: Final answer
    x = 319,169,712.90

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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.