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Finding the Fourth Proportional to 666,358, 999,640.92 and 216,972.76

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Solution

The fourth proportional to 666,358, 999,640.92 and 216,972.76 is: 325,492.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,358 : 999,640.92 = 216,972.76 : x
  2. Step 2: Convert to fraction form
    666,358/999,640.92 = 216,972.76/x
  3. Step 3: Cross multiply
    666,358x = 999,640.92 × 216,972.76
  4. Step 4: Simplify right side
    666,358x = 216,894,849,421.34
  5. Step 5: Solve for x
    x = 216,894,849,421.34/666,358
  6. Step 6: Final answer
    x = 325,492.98

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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.