Home / 991,991.52-1,488,178.80-423,364.32

Finding the Fourth Proportional to 991,991.52, 1,488,178.80 and 423,364.32

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Solution

The fourth proportional to 991,991.52, 1,488,178.80 and 423,364.32 is: 635,128.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,991.52 : 1,488,178.80 = 423,364.32 : x
  2. Step 2: Convert to fraction form
    991,991.52/1,488,178.80 = 423,364.32/x
  3. Step 3: Cross multiply
    991,991.52x = 1,488,178.80 × 423,364.32
  4. Step 4: Simplify right side
    991,991.52x = 630,041,805,700.42
  5. Step 5: Solve for x
    x = 630,041,805,700.42/991,991.52
  6. Step 6: Final answer
    x = 635,128.22

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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.