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Finding the Fourth Proportional to 612,159.40, 918,334.17 and 312,477.83

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Solution

The fourth proportional to 612,159.40, 918,334.17 and 312,477.83 is: 468,765.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,159.40 : 918,334.17 = 312,477.83 : x
  2. Step 2: Convert to fraction form
    612,159.40/918,334.17 = 312,477.83/x
  3. Step 3: Cross multiply
    612,159.40x = 918,334.17 × 312,477.83
  4. Step 4: Simplify right side
    612,159.40x = 286,959,064,064.78
  5. Step 5: Solve for x
    x = 286,959,064,064.78/612,159.40
  6. Step 6: Final answer
    x = 468,765.27

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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.