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Finding the Fourth Proportional to 405,275.67, 607,925.80 and 139,032.35

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Solution

The fourth proportional to 405,275.67, 607,925.80 and 139,032.35 is: 208,552.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,275.67 : 607,925.80 = 139,032.35 : x
  2. Step 2: Convert to fraction form
    405,275.67/607,925.80 = 139,032.35/x
  3. Step 3: Cross multiply
    405,275.67x = 607,925.80 × 139,032.35
  4. Step 4: Simplify right side
    405,275.67x = 84,521,352,599.63
  5. Step 5: Solve for x
    x = 84,521,352,599.63/405,275.67
  6. Step 6: Final answer
    x = 208,552.74

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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.