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Finding the Fourth Proportional to 938,139.52, 1,407,428 and 307,015.08

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Solution

The fourth proportional to 938,139.52, 1,407,428 and 307,015.08 is: 460,594.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    938,139.52 : 1,407,428 = 307,015.08 : x
  2. Step 2: Convert to fraction form
    938,139.52/1,407,428 = 307,015.08/x
  3. Step 3: Cross multiply
    938,139.52x = 1,407,428 × 307,015.08
  4. Step 4: Simplify right side
    938,139.52x = 432,101,620,014.24
  5. Step 5: Solve for x
    x = 432,101,620,014.24/938,139.52
  6. Step 6: Final answer
    x = 460,594.20

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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.