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Finding the Fourth Proportional to 612,585.20, 918,877.80 and 443,311.40

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Solution

The fourth proportional to 612,585.20, 918,877.80 and 443,311.40 is: 664,967.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,585.20 : 918,877.80 = 443,311.40 : x
  2. Step 2: Convert to fraction form
    612,585.20/918,877.80 = 443,311.40/x
  3. Step 3: Cross multiply
    612,585.20x = 918,877.80 × 443,311.40
  4. Step 4: Simplify right side
    612,585.20x = 407,349,003,946.92
  5. Step 5: Solve for x
    x = 407,349,003,946.92/612,585.20
  6. Step 6: Final answer
    x = 664,967.10

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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.