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Finding the Fourth Proportional to 282,641.61, 390,041.01 and 155,314.47

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Solution

The fourth proportional to 282,641.61, 390,041.01 and 155,314.47 is: 214,331.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,641.61 : 390,041.01 = 155,314.47 : x
  2. Step 2: Convert to fraction form
    282,641.61/390,041.01 = 155,314.47/x
  3. Step 3: Cross multiply
    282,641.61x = 390,041.01 × 155,314.47
  4. Step 4: Simplify right side
    282,641.61x = 60,579,012,746.41
  5. Step 5: Solve for x
    x = 60,579,012,746.41/282,641.61
  6. Step 6: Final answer
    x = 214,331.54

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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.