Home / 405,234.16-607,307.90-315,385.36

Finding the Fourth Proportional to 405,234.16, 607,307.90 and 315,385.36

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Solution

The fourth proportional to 405,234.16, 607,307.90 and 315,385.36 is: 472,655.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,234.16 : 607,307.90 = 315,385.36 : x
  2. Step 2: Convert to fraction form
    405,234.16/607,307.90 = 315,385.36/x
  3. Step 3: Cross multiply
    405,234.16x = 607,307.90 × 315,385.36
  4. Step 4: Simplify right side
    405,234.16x = 191,536,020,672.34
  5. Step 5: Solve for x
    x = 191,536,020,672.34/405,234.16
  6. Step 6: Final answer
    x = 472,655.17

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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.