Home / 390,688.16-586,265.52-272,123.60

Finding the Fourth Proportional to 390,688.16, 586,265.52 and 272,123.60

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Solution

The fourth proportional to 390,688.16, 586,265.52 and 272,123.60 is: 408,347.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,688.16 : 586,265.52 = 272,123.60 : x
  2. Step 2: Convert to fraction form
    390,688.16/586,265.52 = 272,123.60/x
  3. Step 3: Cross multiply
    390,688.16x = 586,265.52 × 272,123.60
  4. Step 4: Simplify right side
    390,688.16x = 159,536,683,858.27
  5. Step 5: Solve for x
    x = 159,536,683,858.27/390,688.16
  6. Step 6: Final answer
    x = 408,347.89

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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.