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Finding the Fourth Proportional to 578,430.34, 866,515.53 and 398,483.98

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Solution

The fourth proportional to 578,430.34, 866,515.53 and 398,483.98 is: 596,947.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,430.34 : 866,515.53 = 398,483.98 : x
  2. Step 2: Convert to fraction form
    578,430.34/866,515.53 = 398,483.98/x
  3. Step 3: Cross multiply
    578,430.34x = 866,515.53 × 398,483.98
  4. Step 4: Simplify right side
    578,430.34x = 345,292,557,126.21
  5. Step 5: Solve for x
    x = 345,292,557,126.21/578,430.34
  6. Step 6: Final answer
    x = 596,947.52

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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.