Home / 612,123.20-918,184.80-423,166.40

Finding the Fourth Proportional to 612,123.20, 918,184.80 and 423,166.40

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Solution

The fourth proportional to 612,123.20, 918,184.80 and 423,166.40 is: 634,749.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,123.20 : 918,184.80 = 423,166.40 : x
  2. Step 2: Convert to fraction form
    612,123.20/918,184.80 = 423,166.40/x
  3. Step 3: Cross multiply
    612,123.20x = 918,184.80 × 423,166.40
  4. Step 4: Simplify right side
    612,123.20x = 388,544,956,350.72
  5. Step 5: Solve for x
    x = 388,544,956,350.72/612,123.20
  6. Step 6: Final answer
    x = 634,749.60

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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.