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Finding the Fourth Proportional to 630,070.80, 945,106.20 and 431,005.20

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Solution

The fourth proportional to 630,070.80, 945,106.20 and 431,005.20 is: 646,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,070.80 : 945,106.20 = 431,005.20 : x
  2. Step 2: Convert to fraction form
    630,070.80/945,106.20 = 431,005.20/x
  3. Step 3: Cross multiply
    630,070.80x = 945,106.20 × 431,005.20
  4. Step 4: Simplify right side
    630,070.80x = 407,345,686,752.24
  5. Step 5: Solve for x
    x = 407,345,686,752.24/630,070.80
  6. Step 6: Final answer
    x = 646,507.80

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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.