Home / 578,769.60-869,117.76-390,442.08

Finding the Fourth Proportional to 578,769.60, 869,117.76 and 390,442.08

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Solution

The fourth proportional to 578,769.60, 869,117.76 and 390,442.08 is: 586,313.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,769.60 : 869,117.76 = 390,442.08 : x
  2. Step 2: Convert to fraction form
    578,769.60/869,117.76 = 390,442.08/x
  3. Step 3: Cross multiply
    578,769.60x = 869,117.76 × 390,442.08
  4. Step 4: Simplify right side
    578,769.60x = 339,340,145,979.34
  5. Step 5: Solve for x
    x = 339,340,145,979.34/578,769.60
  6. Step 6: Final answer
    x = 586,313.01

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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.