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Finding the Fourth Proportional to 613,078.68, 918,422.28 and 346,031.40

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Solution

The fourth proportional to 613,078.68, 918,422.28 and 346,031.40 is: 518,372.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,078.68 : 918,422.28 = 346,031.40 : x
  2. Step 2: Convert to fraction form
    613,078.68/918,422.28 = 346,031.40/x
  3. Step 3: Cross multiply
    613,078.68x = 918,422.28 × 346,031.40
  4. Step 4: Simplify right side
    613,078.68x = 317,802,947,339.59
  5. Step 5: Solve for x
    x = 317,802,947,339.59/613,078.68
  6. Step 6: Final answer
    x = 518,372.21

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1.5x scale

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.