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Finding the Fourth Proportional to 647,354,328.60, 971,031,492.90 and 238,325,842.20

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Solution

The fourth proportional to 647,354,328.60, 971,031,492.90 and 238,325,842.20 is: 357,488,763.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,354,328.60 : 971,031,492.90 = 238,325,842.20 : x
  2. Step 2: Convert to fraction form
    647,354,328.60/971,031,492.90 = 238,325,842.20/x
  3. Step 3: Cross multiply
    647,354,328.60x = 971,031,492.90 × 238,325,842.20
  4. Step 4: Simplify right side
    647,354,328.60x = 231,421,898,348,115,808
  5. Step 5: Solve for x
    x = 231,421,898,348,115,808/647,354,328.60
  6. Step 6: Final answer
    x = 357,488,763.30

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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.