Home / 438,435.40-657,653.10-142,947.40

Finding the Fourth Proportional to 438,435.40, 657,653.10 and 142,947.40

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Solution

The fourth proportional to 438,435.40, 657,653.10 and 142,947.40 is: 214,421.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,435.40 : 657,653.10 = 142,947.40 : x
  2. Step 2: Convert to fraction form
    438,435.40/657,653.10 = 142,947.40/x
  3. Step 3: Cross multiply
    438,435.40x = 657,653.10 × 142,947.40
  4. Step 4: Simplify right side
    438,435.40x = 94,009,800,746.94
  5. Step 5: Solve for x
    x = 94,009,800,746.94/438,435.40
  6. Step 6: Final answer
    x = 214,421.10

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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.