Home / 405,657.30-608,428.35-139,430.10

Finding the Fourth Proportional to 405,657.30, 608,428.35 and 139,430.10

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Solution

The fourth proportional to 405,657.30, 608,428.35 and 139,430.10 is: 209,125.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,657.30 : 608,428.35 = 139,430.10 : x
  2. Step 2: Convert to fraction form
    405,657.30/608,428.35 = 139,430.10/x
  3. Step 3: Cross multiply
    405,657.30x = 608,428.35 × 139,430.10
  4. Step 4: Simplify right side
    405,657.30x = 84,833,225,683.34
  5. Step 5: Solve for x
    x = 84,833,225,683.34/405,657.30
  6. Step 6: Final answer
    x = 209,125.35

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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.