Home / 398,977.20-598,465.80-249,386.40

Finding the Fourth Proportional to 398,977.20, 598,465.80 and 249,386.40

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Solution

The fourth proportional to 398,977.20, 598,465.80 and 249,386.40 is: 374,079.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,977.20 : 598,465.80 = 249,386.40 : x
  2. Step 2: Convert to fraction form
    398,977.20/598,465.80 = 249,386.40/x
  3. Step 3: Cross multiply
    398,977.20x = 598,465.80 × 249,386.40
  4. Step 4: Simplify right side
    398,977.20x = 149,249,231,385.12
  5. Step 5: Solve for x
    x = 149,249,231,385.12/398,977.20
  6. Step 6: Final answer
    x = 374,079.60

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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.