Home / 991,423.18-1,368,160.63-561,785.21

Finding the Fourth Proportional to 991,423.18, 1,368,160.63 and 561,785.21

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Solution

The fourth proportional to 991,423.18, 1,368,160.63 and 561,785.21 is: 775,261.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,423.18 : 1,368,160.63 = 561,785.21 : x
  2. Step 2: Convert to fraction form
    991,423.18/1,368,160.63 = 561,785.21/x
  3. Step 3: Cross multiply
    991,423.18x = 1,368,160.63 × 561,785.21
  4. Step 4: Simplify right side
    991,423.18x = 768,612,406,838.28
  5. Step 5: Solve for x
    x = 768,612,406,838.28/991,423.18
  6. Step 6: Final answer
    x = 775,261.69

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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.