Home / 565,507,814.90-780,407,966.45-311,218,449.35

Finding the Fourth Proportional to 565,507,814.90, 780,407,966.45 and 311,218,449.35

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Solution

The fourth proportional to 565,507,814.90, 780,407,966.45 and 311,218,449.35 is: 429,485,412.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,507,814.90 : 780,407,966.45 = 311,218,449.35 : x
  2. Step 2: Convert to fraction form
    565,507,814.90/780,407,966.45 = 311,218,449.35/x
  3. Step 3: Cross multiply
    565,507,814.90x = 780,407,966.45 × 311,218,449.35
  4. Step 4: Simplify right side
    565,507,814.90x = 242,877,357,175,831,840
  5. Step 5: Solve for x
    x = 242,877,357,175,831,840/565,507,814.90
  6. Step 6: Final answer
    x = 429,485,412.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.