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Finding the Fourth Proportional to 670,744.92, 925,322.65 and 398,658.20

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Solution

The fourth proportional to 670,744.92, 925,322.65 and 398,658.20 is: 549,966.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,744.92 : 925,322.65 = 398,658.20 : x
  2. Step 2: Convert to fraction form
    670,744.92/925,322.65 = 398,658.20/x
  3. Step 3: Cross multiply
    670,744.92x = 925,322.65 × 398,658.20
  4. Step 4: Simplify right side
    670,744.92x = 368,887,462,068.23
  5. Step 5: Solve for x
    x = 368,887,462,068.23/670,744.92
  6. Step 6: Final answer
    x = 549,966.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.