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Finding the Fourth Proportional to 315,605.57, 473,408.15 and 78,948.07

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Solution

The fourth proportional to 315,605.57, 473,408.15 and 78,948.07 is: 118,422.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,605.57 : 473,408.15 = 78,948.07 : x
  2. Step 2: Convert to fraction form
    315,605.57/473,408.15 = 78,948.07/x
  3. Step 3: Cross multiply
    315,605.57x = 473,408.15 × 78,948.07
  4. Step 4: Simplify right side
    315,605.57x = 37,374,658,186.51
  5. Step 5: Solve for x
    x = 37,374,658,186.51/315,605.57
  6. Step 6: Final answer
    x = 118,422.05

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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.