Home / 666,380,129.28-918,958,533.12-519,648,875.52

Finding the Fourth Proportional to 666,380,129.28, 918,958,533.12 and 519,648,875.52

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Solution

The fourth proportional to 666,380,129.28, 918,958,533.12 and 519,648,875.52 is: 716,611,656.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,380,129.28 : 918,958,533.12 = 519,648,875.52 : x
  2. Step 2: Convert to fraction form
    666,380,129.28/918,958,533.12 = 519,648,875.52/x
  3. Step 3: Cross multiply
    666,380,129.28x = 918,958,533.12 × 519,648,875.52
  4. Step 4: Simplify right side
    666,380,129.28x = 477,535,768,385,316,672
  5. Step 5: Solve for x
    x = 477,535,768,385,316,672/666,380,129.28
  6. Step 6: Final answer
    x = 716,611,656.62

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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.