Home / 1,308.48-1,962.50-430.98

Finding the Fourth Proportional to 1,308.48, 1,962.50 and 430.98

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Solution

The fourth proportional to 1,308.48, 1,962.50 and 430.98 is: 646.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.48 : 1,962.50 = 430.98 : x
  2. Step 2: Convert to fraction form
    1,308.48/1,962.50 = 430.98/x
  3. Step 3: Cross multiply
    1,308.48x = 1,962.50 × 430.98
  4. Step 4: Simplify right side
    1,308.48x = 845,798.25
  5. Step 5: Solve for x
    x = 845,798.25/1,308.48
  6. Step 6: Final answer
    x = 646.40

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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.