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Finding the Fourth Proportional to 659,638.80, 988,291.80 and 559,328.40

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Solution

The fourth proportional to 659,638.80, 988,291.80 and 559,328.40 is: 838,003.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,638.80 : 988,291.80 = 559,328.40 : x
  2. Step 2: Convert to fraction form
    659,638.80/988,291.80 = 559,328.40/x
  3. Step 3: Cross multiply
    659,638.80x = 988,291.80 × 559,328.40
  4. Step 4: Simplify right side
    659,638.80x = 552,779,671,227.12
  5. Step 5: Solve for x
    x = 552,779,671,227.12/659,638.80
  6. Step 6: Final answer
    x = 838,003.57

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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.