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Finding the Fourth Proportional to 661,647.40, 992,471.10 and 630,543.40

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Solution

The fourth proportional to 661,647.40, 992,471.10 and 630,543.40 is: 945,815.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,647.40 : 992,471.10 = 630,543.40 : x
  2. Step 2: Convert to fraction form
    661,647.40/992,471.10 = 630,543.40/x
  3. Step 3: Cross multiply
    661,647.40x = 992,471.10 × 630,543.40
  4. Step 4: Simplify right side
    661,647.40x = 625,796,101,795.74
  5. Step 5: Solve for x
    x = 625,796,101,795.74/661,647.40
  6. Step 6: Final answer
    x = 945,815.10

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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.