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Finding the Fourth Proportional to 315,140.60, 472,638.80 and 90,499.26

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Solution

The fourth proportional to 315,140.60, 472,638.80 and 90,499.26 is: 135,728.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,140.60 : 472,638.80 = 90,499.26 : x
  2. Step 2: Convert to fraction form
    315,140.60/472,638.80 = 90,499.26/x
  3. Step 3: Cross multiply
    315,140.60x = 472,638.80 × 90,499.26
  4. Step 4: Simplify right side
    315,140.60x = 42,773,461,647.29
  5. Step 5: Solve for x
    x = 42,773,461,647.29/315,140.60
  6. Step 6: Final answer
    x = 135,728.18

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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.