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Finding the Fourth Proportional to 405,235.71, 607,310.19 and 315,386.90

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Solution

The fourth proportional to 405,235.71, 607,310.19 and 315,386.90 is: 472,657.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,235.71 : 607,310.19 = 315,386.90 : x
  2. Step 2: Convert to fraction form
    405,235.71/607,310.19 = 315,386.90/x
  3. Step 3: Cross multiply
    405,235.71x = 607,310.19 × 315,386.90
  4. Step 4: Simplify right side
    405,235.71x = 191,537,677,403.37
  5. Step 5: Solve for x
    x = 191,537,677,403.37/405,235.71
  6. Step 6: Final answer
    x = 472,657.45

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1.5x scale

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.