Home / 438,320.40-657,480.60-280,856.40

Finding the Fourth Proportional to 438,320.40, 657,480.60 and 280,856.40

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Solution

The fourth proportional to 438,320.40, 657,480.60 and 280,856.40 is: 421,284.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,320.40 : 657,480.60 = 280,856.40 : x
  2. Step 2: Convert to fraction form
    438,320.40/657,480.60 = 280,856.40/x
  3. Step 3: Cross multiply
    438,320.40x = 657,480.60 × 280,856.40
  4. Step 4: Simplify right side
    438,320.40x = 184,657,634,385.84
  5. Step 5: Solve for x
    x = 184,657,634,385.84/438,320.40
  6. Step 6: Final answer
    x = 421,284.60

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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.