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Finding the Fourth Proportional to 879,461.80, 1,319,630.10 and 347,000.20

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Solution

The fourth proportional to 879,461.80, 1,319,630.10 and 347,000.20 is: 520,672.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,461.80 : 1,319,630.10 = 347,000.20 : x
  2. Step 2: Convert to fraction form
    879,461.80/1,319,630.10 = 347,000.20/x
  3. Step 3: Cross multiply
    879,461.80x = 1,319,630.10 × 347,000.20
  4. Step 4: Simplify right side
    879,461.80x = 457,911,908,626.02
  5. Step 5: Solve for x
    x = 457,911,908,626.02/879,461.80
  6. Step 6: Final answer
    x = 520,672.88

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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.