Home / 991,484.88-1,486,961.64-430,386

Finding the Fourth Proportional to 991,484.88, 1,486,961.64 and 430,386

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Solution

The fourth proportional to 991,484.88, 1,486,961.64 and 430,386 is: 645,463.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,484.88 : 1,486,961.64 = 430,386 : x
  2. Step 2: Convert to fraction form
    991,484.88/1,486,961.64 = 430,386/x
  3. Step 3: Cross multiply
    991,484.88x = 1,486,961.64 × 430,386
  4. Step 4: Simplify right side
    991,484.88x = 639,967,472,393.04
  5. Step 5: Solve for x
    x = 639,967,472,393.04/991,484.88
  6. Step 6: Final answer
    x = 645,463.67

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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.