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Finding the Fourth Proportional to 659,411.40, 986,492.70 and 571,639.80

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Solution

The fourth proportional to 659,411.40, 986,492.70 and 571,639.80 is: 855,184.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,411.40 : 986,492.70 = 571,639.80 : x
  2. Step 2: Convert to fraction form
    659,411.40/986,492.70 = 571,639.80/x
  3. Step 3: Cross multiply
    659,411.40x = 986,492.70 × 571,639.80
  4. Step 4: Simplify right side
    659,411.40x = 563,918,489,729.46
  5. Step 5: Solve for x
    x = 563,918,489,729.46/659,411.40
  6. Step 6: Final answer
    x = 855,184.62

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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.