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Finding the Fourth Proportional to 390,280.80, 584,740.80 and 179,486.40

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Solution

The fourth proportional to 390,280.80, 584,740.80 and 179,486.40 is: 268,916.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,280.80 : 584,740.80 = 179,486.40 : x
  2. Step 2: Convert to fraction form
    390,280.80/584,740.80 = 179,486.40/x
  3. Step 3: Cross multiply
    390,280.80x = 584,740.80 × 179,486.40
  4. Step 4: Simplify right side
    390,280.80x = 104,953,021,125.12
  5. Step 5: Solve for x
    x = 104,953,021,125.12/390,280.80
  6. Step 6: Final answer
    x = 268,916.69

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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.