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Finding the Fourth Proportional to 354,011.40, 531,017.10 and 319,019.40

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Solution

The fourth proportional to 354,011.40, 531,017.10 and 319,019.40 is: 478,529.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,011.40 : 531,017.10 = 319,019.40 : x
  2. Step 2: Convert to fraction form
    354,011.40/531,017.10 = 319,019.40/x
  3. Step 3: Cross multiply
    354,011.40x = 531,017.10 × 319,019.40
  4. Step 4: Simplify right side
    354,011.40x = 169,404,756,631.74
  5. Step 5: Solve for x
    x = 169,404,756,631.74/354,011.40
  6. Step 6: Final answer
    x = 478,529.10

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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.