Home / 282,815.47-390,275.38-155,490.09

Finding the Fourth Proportional to 282,815.47, 390,275.38 and 155,490.09

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Solution

The fourth proportional to 282,815.47, 390,275.38 and 155,490.09 is: 214,570.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,815.47 : 390,275.38 = 155,490.09 : x
  2. Step 2: Convert to fraction form
    282,815.47/390,275.38 = 155,490.09/x
  3. Step 3: Cross multiply
    282,815.47x = 390,275.38 × 155,490.09
  4. Step 4: Simplify right side
    282,815.47x = 60,683,953,960.98
  5. Step 5: Solve for x
    x = 60,683,953,960.98/282,815.47
  6. Step 6: Final answer
    x = 214,570.84

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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.