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Finding the Fourth Proportional to 310,590.17, 465,895.58 and 85,931.81

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Solution

The fourth proportional to 310,590.17, 465,895.58 and 85,931.81 is: 128,900.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,590.17 : 465,895.58 = 85,931.81 : x
  2. Step 2: Convert to fraction form
    310,590.17/465,895.58 = 85,931.81/x
  3. Step 3: Cross multiply
    310,590.17x = 465,895.58 × 85,931.81
  4. Step 4: Simplify right side
    310,590.17x = 40,035,250,460.40
  5. Step 5: Solve for x
    x = 40,035,250,460.40/310,590.17
  6. Step 6: Final answer
    x = 128,900.57

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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.