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Finding the Fourth Proportional to 647,492.80, 971,312.10 and 198,210.10

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Solution

The fourth proportional to 647,492.80, 971,312.10 and 198,210.10 is: 297,337.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,492.80 : 971,312.10 = 198,210.10 : x
  2. Step 2: Convert to fraction form
    647,492.80/971,312.10 = 198,210.10/x
  3. Step 3: Cross multiply
    647,492.80x = 971,312.10 × 198,210.10
  4. Step 4: Simplify right side
    647,492.80x = 192,523,868,472.21
  5. Step 5: Solve for x
    x = 192,523,868,472.21/647,492.80
  6. Step 6: Final answer
    x = 297,337.47

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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.