Home / 282,638.61-390,036.87-155,311.47

Finding the Fourth Proportional to 282,638.61, 390,036.87 and 155,311.47

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Solution

The fourth proportional to 282,638.61, 390,036.87 and 155,311.47 is: 214,327.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,638.61 : 390,036.87 = 155,311.47 : x
  2. Step 2: Convert to fraction form
    282,638.61/390,036.87 = 155,311.47/x
  3. Step 3: Cross multiply
    282,638.61x = 390,036.87 × 155,311.47
  4. Step 4: Simplify right side
    282,638.61x = 60,577,199,633.90
  5. Step 5: Solve for x
    x = 60,577,199,633.90/282,638.61
  6. Step 6: Final answer
    x = 214,327.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.