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Finding the Fourth Proportional to 612,217.36, 918,420.72 and 312,535.36

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Solution

The fourth proportional to 612,217.36, 918,420.72 and 312,535.36 is: 468,851.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,217.36 : 918,420.72 = 312,535.36 : x
  2. Step 2: Convert to fraction form
    612,217.36/918,420.72 = 312,535.36/x
  3. Step 3: Cross multiply
    612,217.36x = 918,420.72 × 312,535.36
  4. Step 4: Simplify right side
    612,217.36x = 287,038,950,356.66
  5. Step 5: Solve for x
    x = 287,038,950,356.66/612,217.36
  6. Step 6: Final answer
    x = 468,851.37

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1.5x scale

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.