Home / 718,259.81-991,206.18-395,981.45

Finding the Fourth Proportional to 718,259.81, 991,206.18 and 395,981.45

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Solution

The fourth proportional to 718,259.81, 991,206.18 and 395,981.45 is: 546,458.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,259.81 : 991,206.18 = 395,981.45 : x
  2. Step 2: Convert to fraction form
    718,259.81/991,206.18 = 395,981.45/x
  3. Step 3: Cross multiply
    718,259.81x = 991,206.18 × 395,981.45
  4. Step 4: Simplify right side
    718,259.81x = 392,499,257,681.42
  5. Step 5: Solve for x
    x = 392,499,257,681.42/718,259.81
  6. Step 6: Final answer
    x = 546,458.61

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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.