Home / 991,790.60-1,487,702.30-430,825.10

Finding the Fourth Proportional to 991,790.60, 1,487,702.30 and 430,825.10

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Solution

The fourth proportional to 991,790.60, 1,487,702.30 and 430,825.10 is: 646,244.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,790.60 : 1,487,702.30 = 430,825.10 : x
  2. Step 2: Convert to fraction form
    991,790.60/1,487,702.30 = 430,825.10/x
  3. Step 3: Cross multiply
    991,790.60x = 1,487,702.30 × 430,825.10
  4. Step 4: Simplify right side
    991,790.60x = 640,939,482,575.09
  5. Step 5: Solve for x
    x = 640,939,482,575.09/991,790.60
  6. Step 6: Final answer
    x = 646,244.77

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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.