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Finding the Fourth Proportional to 659,390.40, 986,461.20 and 571,618.80

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Solution

The fourth proportional to 659,390.40, 986,461.20 and 571,618.80 is: 855,153.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,390.40 : 986,461.20 = 571,618.80 : x
  2. Step 2: Convert to fraction form
    659,390.40/986,461.20 = 571,618.80/x
  3. Step 3: Cross multiply
    659,390.40x = 986,461.20 × 571,618.80
  4. Step 4: Simplify right side
    659,390.40x = 563,879,767,390.56
  5. Step 5: Solve for x
    x = 563,879,767,390.56/659,390.40
  6. Step 6: Final answer
    x = 855,153.13

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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.